diff --git a/Lua_scripts/MultiChan.txt b/Lua_scripts/MultiChan.txt
index 7a0846a..b761af7 100644
--- a/Lua_scripts/MultiChan.txt
+++ b/Lua_scripts/MultiChan.txt
@@ -121,7 +121,9 @@
 49,2,KF606,ZCZ50,1,Trim,UNK
 9,0,KN,WLToys,0,DRate,THold,IdleUp,Gyro,Ttrim,Atrim,Etrim
 9,1,KN,Feilun,0,DRate,THold,IdleUp,Gyro,Ttrim,Atrim,Etrim
-73,0,Kyosho,Std,0,CH5,CH6,CH7,CH8,CH9,CH10,CH11,CH12,CH13,CH14
+73,0,Kyosho,FHSS,0,CH5,CH6,CH7,CH8,CH9,CH10,CH11,CH12,CH13,CH14
+73,1,Kyosho,Hype,0,CH5,CH6
+73,2,Kyosho,Syncro,0,CH5,CH6
 18,0,MJXQ,WHL08,1,Flip,LED,Pict,Video,HLess,RTH,AuFlip,Pan,Tilt,Rate
 18,1,MJXQ,X600,1,Flip,LED,Pict,Video,HLess,RTH,AuFlip,Pan,Tilt,Rate
 18,2,MJXQ,X800,1,Flip,LED,Pict,Video,HLess,RTH,AuFlip,Pan,Tilt,Rate
diff --git a/Multiprotocol/A7105_SPI.ino b/Multiprotocol/A7105_SPI.ino
index ac8f2bc..5a5927f 100644
--- a/Multiprotocol/A7105_SPI.ino
+++ b/Multiprotocol/A7105_SPI.ino
@@ -418,7 +418,7 @@ void A7105_Init(void)
 			#ifdef KYOSHO_A7105_INO
 				if(protocol==PROTO_KYOSHO)
 				{
-					if(sub_protocol==KYOSHO_FHSS)
+					if(sub_protocol==KYOSHO_FHSS || sub_protocol==KYOSHO_SYNCRO)
 						A7105_Regs=(uint8_t*)KYOSHO_A7105_regs;
 					else
 						A7105_Regs=(uint8_t*)KYOSHO_HYPE_A7105_regs;
@@ -446,7 +446,7 @@ void A7105_Init(void)
 	}
 	A7105_Strobe(A7105_STANDBY);
 
-	if(protocol==PROTO_KYOSHO && sub_protocol==KYOSHO_FHSS)
+	if(protocol==PROTO_KYOSHO && (sub_protocol==KYOSHO_FHSS || sub_protocol==KYOSHO_SYNCRO))
 	{//strange calibration...
 		//IF Filter Bank Calibration
 		A7105_WriteReg(A7105_02_CALC,0x0F);
diff --git a/Multiprotocol/Kyosho_a7105.ino b/Multiprotocol/Kyosho_a7105.ino
index 18c24c7..2618d09 100644
--- a/Multiprotocol/Kyosho_a7105.ino
+++ b/Multiprotocol/Kyosho_a7105.ino
@@ -19,6 +19,7 @@
 
 //#define KYOSHO_FORCE_ID_FHSS
 //#define KYOSHO_FORCE_ID_HYPE
+//#define KYOSHO_FORCE_ID_SYNCRO
 
 //Kyosho constants & variables
 #define KYOSHO_BIND_COUNT 2500
@@ -32,6 +33,11 @@ static void __attribute__((unused)) KYOSHO_send_packet()
 	packet[4] = rx_tx_addr[3];
 	//unknown may be RX ID on some other remotes
 	memset(packet+5,0xFF,4);
+
+	//unknwon but for Syncro the same values are used for bind and normal
+	packet[27]  = sub_protocol==KYOSHO_FHSS?0x05:0x07;	// Syncro is 7
+	packet[28]  = 0x00;
+	memset(packet+29,0xFF,8);
 	
 	if(IS_BIND_IN_PROGRESS)
 	{
@@ -42,10 +48,6 @@ static void __attribute__((unused)) KYOSHO_send_packet()
 		//RF table
 		for(uint8_t i=0; i<16;i++)
 			packet[i+11]=hopping_frequency[i+(packet[9]<<4)];
-		//unknwon
-		packet[27]  = 0x05;
-		packet[28]  = 0x00;
-		memset(packet+29,0xFF,8);
 		//frequency hop during bind
 		if(packet[9])
 			rf_ch_num=0x8C;
@@ -55,13 +57,20 @@ static void __attribute__((unused)) KYOSHO_send_packet()
 	else
 	{
 		packet[ 0]  = 0x58;						// normal packet
-		//14 channels: steering, throttle, ...
-		for(uint8_t i = 0; i < 14; i++)
+		//FHSS  14 channels: steering, throttle, ...
+		//Syncro 6 channels: steering, throttle, ...
+		for(uint8_t i = 0; i < sub_protocol==KYOSHO_FHSS?14:6; i++)
 		{
 			uint16_t temp=convert_channel_ppm(i);
 			packet[9 + i*2]=temp&0xFF;			// low byte of servo timing(1000-2000us)
 			packet[10 + i*2]=(temp>>8)&0xFF;	// high byte of servo timing(1000-2000us)
 		}
+		if(sub_protocol==KYOSHO_SYNCRO)
+		{
+			memcpy(&packet[21],&hopping_frequency[11],6);
+			packet[34] = 0x0F;
+			packet[36] = 0x0F;
+		}
 		rf_ch_num=hopping_frequency[hopping_frequency_no];
 		hopping_frequency_no++;
 		packet[34] |= (hopping_frequency_no&0x0F)<<4;
@@ -150,7 +159,7 @@ uint16_t KYOSHO_callback()
 			telemetry_set_input_sync(packet_period);
 		#endif
 	}
-	if(sub_protocol==KYOSHO_FHSS)
+	if(sub_protocol==KYOSHO_FHSS || sub_protocol==KYOSHO_SYNCRO)
 		KYOSHO_send_packet();
 	else//HYPE
 		KYOSHO_hype_send_packet();
@@ -162,7 +171,7 @@ void KYOSHO_init()
 	A7105_Init();
 
 	// compute channels from ID
-	calc_fh_channels(sub_protocol==KYOSHO_FHSS?32:15);
+	calc_fh_channels(sub_protocol==KYOSHO_HYPE?15:32);
 	hopping_frequency_no=0;
 
 	#ifdef KYOSHO_FORCE_ID_FHSS
@@ -172,6 +181,13 @@ void KYOSHO_init()
 			memcpy(hopping_frequency,"\x29\x4C\x67\x92\x31\x1C\x77\x18\x23\x6E\x81\x5C\x8F\x5A\x51\x94\x7A\x12\x45\x6C\x7F\x1E\x0D\x88\x63\x8C\x4F\x37\x26\x61\x2C\x8A",32);
 		}
 	#endif
+	#ifdef KYOSHO_FORCE_ID_SYNCRO
+		if(sub_protocol==KYOSHO_SYNCRO)
+		{
+			memcpy(rx_tx_addr,"\x00\xC2\x24\x00",4);
+			memcpy(hopping_frequency,"\x73\x12\x7D\x88\x63\x4A\x8D\x60\x57\x16\x5D\x8B\x25\x53\x6E\x3C\x41\x70\x20\x83\x2A\x19\x94\x2F\x91\x4C\x47\x36\x78\x10\x5A\x31",32);
+		}
+	#endif
 	if(sub_protocol==KYOSHO_HYPE)
 	{
 		MProtocol_id &= 0x00FF00FF;
diff --git a/Multiprotocol/Multi.txt b/Multiprotocol/Multi.txt
index f420d6a..8f1cfcb 100644
--- a/Multiprotocol/Multi.txt
+++ b/Multiprotocol/Multi.txt
@@ -70,7 +70,7 @@
 70,DSM_RX,Multi,CloneTX,EraseTX,CPPM
 71,JJRC345,JJRC345,SkyTmblr
 72,Q90C
-73,Kyosho,FHSS,Hype
+73,Kyosho,FHSS,Hype,Syncro
 74,RadioLink,Surface,Air,DumboRC
 75,---
 76,Realacc,R11
diff --git a/Multiprotocol/Multi_Protos.ino b/Multiprotocol/Multi_Protos.ino
index 32bd83e..6030461 100644
--- a/Multiprotocol/Multi_Protos.ino
+++ b/Multiprotocol/Multi_Protos.ino
@@ -169,7 +169,7 @@ const char STR_SUBTYPE_PELIKAN[] =    "\x05""Pro\0 ""Lite\0""SCX24";
 const char STR_SUBTYPE_V761[] =       "\x05""3ch\0 ""4ch\0 ""TOPRC";
 const char STR_SUBTYPE_RLINK[] =      "\x07""Surface""Air\0   ""DumboRC";
 const char STR_SUBTYPE_REALACC[] =    "\x03""R11";
-const char STR_SUBTYPE_KYOSHO[] =     "\x04""FHSS""Hype";
+const char STR_SUBTYPE_KYOSHO[] =     "\x06""FHSS""Hype""Sync";
 const char STR_SUBTYPE_KYOSHO2[] =    "\x05""KT-17";
 const char STR_SUBTYPE_FUTABA[] =     "\x05""SFHSS";
 const char STR_SUBTYPE_JJRC345[] =    "\x08""JJRC345\0""SkyTmblr";
@@ -379,7 +379,7 @@ const mm_protocol_definition multi_protocols[] = {
 		{PROTO_KN,         STR_KN,        STR_SUBTYPE_KN,        2, OPTION_NONE,    0, 0, SW_NRF,    KN_init,         KN_callback         },
 	#endif
 	#if defined(KYOSHO_A7105_INO)
-		{PROTO_KYOSHO,     STR_KYOSHO,    STR_SUBTYPE_KYOSHO,    2, OPTION_NONE,    0, 1, SW_A7105,  KYOSHO_init,     KYOSHO_callback     },
+		{PROTO_KYOSHO,     STR_KYOSHO,    STR_SUBTYPE_KYOSHO,    3, OPTION_NONE,    0, 1, SW_A7105,  KYOSHO_init,     KYOSHO_callback     },
 	#endif
 	#if defined(KYOSHO2_NRF24L01_INO)
 		{PROTO_KYOSHO2,    STR_KYOSHO2,   STR_SUBTYPE_KYOSHO2,   1, OPTION_NONE,    0, 0, SW_NRF,    KYOSHO2_init,    KYOSHO2_callback    },
diff --git a/Multiprotocol/Multiprotocol.h b/Multiprotocol/Multiprotocol.h
index abfb044..ca506d8 100644
--- a/Multiprotocol/Multiprotocol.h
+++ b/Multiprotocol/Multiprotocol.h
@@ -19,7 +19,7 @@
 #define VERSION_MAJOR		1
 #define VERSION_MINOR		3
 #define VERSION_REVISION	3
-#define VERSION_PATCH_LEVEL	43
+#define VERSION_PATCH_LEVEL	44
 
 #define MODE_SERIAL 0
 
@@ -437,8 +437,9 @@ enum HEIGHT
 };
 enum KYOSHO
 {
-	KYOSHO_FHSS	= 0,
-	KYOSHO_HYPE	= 1,
+	KYOSHO_FHSS		= 0,
+	KYOSHO_HYPE		= 1,
+	KYOSHO_SYNCRO	= 2,
 };
 enum JJRC345
 {
@@ -833,8 +834,8 @@ enum {
 #define DSM_RX_EEPROM_OFFSET	877		// (4) TX ID + format, 5 bytes, end is 882
 #define MOULDKG_EEPROM_OFFSET	882		// RX ID, 3 bytes per model, end is 882+64*3=1074
 #define DSM_CLONE_EEPROM_OFFSET	1074	// (4) TX ID, (1) Initialized, end is 1079
-#define TRAXXAS_EEPROM_OFFSET	1079	// RX ID, 2 bytes per model id, end is 1079+128=1207
-//#define CONFIG_EEPROM_OFFSET 	1207	// Current configuration of the multimodule
+#define TRAXXAS_EEPROM_OFFSET	1079	// RX ID and SOP index, 3 bytes per model id, end is 1079+192=1271
+//#define CONFIG_EEPROM_OFFSET 	1271	// Current configuration of the multimodule
 
 /* STM32 Flash Size */
 #ifndef DISABLE_FLASH_SIZE_CHECK
diff --git a/Multiprotocol/_Config.h b/Multiprotocol/_Config.h
index e70c12d..32fc041 100644
--- a/Multiprotocol/_Config.h
+++ b/Multiprotocol/_Config.h
@@ -734,6 +734,7 @@ const PPM_Parameters PPM_prot[14*NBR_BANKS]=	{
 	PROTO_KYOSHO
 		KYOSHO_FHSS
 		KYOSHO_HYPE
+		KYOSHO_SYNCRO
 	PROTO_KYOSHO2
 		NONE
 	PROTO_LOLI
diff --git a/Protocols_Details.md b/Protocols_Details.md
index 5976c29..94a7b03 100644
--- a/Protocols_Details.md
+++ b/Protocols_Details.md
@@ -113,7 +113,7 @@ CFlie|38|CFlie||||||||NRF24L01|
 [JOYSWAY](Protocols_Details.md#JOYSWAY---84)|84|||||||||NRF24L01|XN297
 [KF606](Protocols_Details.md#KF606---49)|49|KF606|MIG320|ZCZ50||||||NRF24L01|XN297
 [KN](Protocols_Details.md#KN---9)|9|WLTOYS|FEILUN|||||||NRF24L01|
-[Kyosho](Protocols_Details.md#Kyosho---73)|73|FHSS|Hype|||||||A7105|
+[Kyosho](Protocols_Details.md#Kyosho---73)|73|FHSS|Hype|Syncro||||||A7105|
 [Kyosho2](Protocols_Details.md#Kyosho2---93)|93|KT-17||||||||NRF24L01|
 [LOLI](Protocols_Details.md#LOLI---82)|82|||||||||NRF24L01|
 [Losi](Protocols_Details.md#Losi---89)|89|||||||||CYRF6936|
@@ -343,6 +343,15 @@ A|E|T|R|CH5|CH6
 
 RX output will match the Hype standard AETR independently of the input configuration AETR, RETA... unless on OpenTX 2.3.3+ you use the "Disable channel mapping" feature on the GUI.
 
+### Sub_protocol Syncro - *2*
+Surface protocol called Syncro. TX: KT-331, RX: KR-331
+
+Extended limits supported
+
+CH1|CH2|CH3|CH4|CH5|CH6
+---|---|---|---|---|---
+STEERING|THROTTLE|CH3|CH4|CH5|CH6
+
 ## Pelikan - *60*
 Extended limits supported