diff --git a/Lua_scripts/MultiChan.txt b/Lua_scripts/MultiChan.txt
index 68aaf0d..1c28144 100644
--- a/Lua_scripts/MultiChan.txt
+++ b/Lua_scripts/MultiChan.txt
@@ -193,7 +193,7 @@
 62,0,XK,X450,1,FMode,TakeOf,Emerg,3D_6G,Pict,Video
 62,1,XK,X420,1,FMode,TakeOf,Emerg,3D_6G,Pict,Video,Flip,Light
 62,2,XK,Cars,0,FMode,TakeOf,Emerg,3D_6G,Pict,Video,Flip,Light
-99,0,XK2,X4,0,Rate,Mode,Hover
+99,0,XK2,X4,0,Rate,Mode,Hover,Light
 8,0,YD717,Std,1,Flip,Light,Pict,Video,HLess
 8,1,YD717,SkyWlkr,1,Flip,Light,Pict,Video,HLess
 8,2,YD717,Simax4,1,Flip,Light,Pict,Video,HLess
diff --git a/Multiprotocol/Multiprotocol.h b/Multiprotocol/Multiprotocol.h
index 8822e1b..936d877 100644
--- a/Multiprotocol/Multiprotocol.h
+++ b/Multiprotocol/Multiprotocol.h
@@ -19,7 +19,7 @@
 #define VERSION_MAJOR		1
 #define VERSION_MINOR		3
 #define VERSION_REVISION	4
-#define VERSION_PATCH_LEVEL	18
+#define VERSION_PATCH_LEVEL	19
 
 #define MODE_SERIAL 0
 
diff --git a/Multiprotocol/XK2_ccnrf.ino b/Multiprotocol/XK2_ccnrf.ino
index 429afed..01463d5 100644
--- a/Multiprotocol/XK2_ccnrf.ino
+++ b/Multiprotocol/XK2_ccnrf.ino
@@ -70,13 +70,14 @@ static void __attribute__((unused)) XK2_send_packet()
 		//Flags
 		packet[5] = GET_FLAG(CH5_SW, 0x01)								//Rate
 				  | GET_FLAG(CH6_SW, 0x08)								//Mode
-				  | GET_FLAG(CH7_SW, 0x20);								//Hover
+				  | GET_FLAG(CH7_SW, 0x20)								//Hover
+				  | GET_FLAG(CH8_SW, 0x40);								//Light
 		//Telemetry not received=00, Telemetry received=01 but sometimes switch to 1 even if telemetry is not there...
 		packet[6] = 0x00;
 		//Unknown
 		packet[7] = crc8;												//?? RX_ID checksum ?? => sum RX_ID[0..2]
 		//Checksum seed
-		packet[8] = 0x7F;												//Constant?
+		packet[8] = num_ch;												//Based on TX ID but calculation is unknown
 	}
 	//Checksum
 	for(uint8_t i=0; i<XK2_PAYLOAD_SIZE-1; i++)
@@ -108,14 +109,28 @@ static void __attribute__((unused)) XK2_RF_init()
 static void __attribute__((unused)) XK2_initialize_txid()
 {
 	#ifdef FORCE_XK2_ID
+	if(rx_tx_addr[3]&1)
+	{
 		rx_tx_addr[0] = 0x66;
 		rx_tx_addr[1] = 0x4F;
 		rx_tx_addr[2] = 0x47;
-		for(uint8_t i=0;i<XK2_RF_NUM_CHANNELS;i++)
-			hopping_frequency[i] = 65 + i*4;	//65=0x41, 69=0x45, 73=0x49, 77=0x4D
+		num_ch = 0x7F;				// Must be based on the ID but calculation unknow yet
+		//hopping frequencies 65=0x41, 69=0x45, 73=0x49, 77=0x4D
+	}
+	else
+	{
+		rx_tx_addr[0] = 0x36;
+		rx_tx_addr[1] = 0x49;
+		rx_tx_addr[2] = 0x6B;
+		num_ch = 0x79;				// Must be based on the ID but calculation unknow yet
+		//hopping frequencies 65=0x41, 69=0x45, 73=0x49, 77=0x4D
+	}
 	#endif
+	for(uint8_t i=0;i<XK2_RF_NUM_CHANNELS;i++)	// Are these RF frequencies always the same?
+		hopping_frequency[i] = 65 + i*4;		//65=0x41, 69=0x45, 73=0x49, 77=0x4D
 	rx_tx_addr[3] = 0xCC;
 	rx_tx_addr[4] = 0xCC;
+	debugln("ID: %02X %02X %02X %02X %02X , HOP: %02X %02X %02X %02X",rx_tx_addr[0],rx_tx_addr[1],rx_tx_addr[2],rx_tx_addr[3],rx_tx_addr[4],hopping_frequency[0],hopping_frequency[1],hopping_frequency[2],hopping_frequency[3]);
 }
 
 uint16_t XK2_callback()
@@ -271,6 +286,7 @@ P[4] = alternates 20,60,A0,E0
 P[5] = flags
         01=high rate
 		20=hover=long_press_left
+		40=light -> temporary
 		08=6g/3d=short_press_right sequece also switches for a few packets to C1 if 8 C0 if 0
 P[6] = 00 telemetry nok
        01 telemetry ok but sometimes switch to 1 also when telemetry is nok...
diff --git a/Protocols_Details.md b/Protocols_Details.md
index 5b0625f..cc5ffd7 100644
--- a/Protocols_Details.md
+++ b/Protocols_Details.md
@@ -1515,17 +1515,17 @@ Models: WLtoys cars 284131/284161/284010/124016/124017/144010 and Eachine EAT14
 ## XK2 - *99*
 
 ### Sub_protocol X4 - *0*
-Transmitter: XK X4-A160, model: XK A160S
+Transmitter: XK X4-A160, X5S, model: XK A160S, XK A280
 
-**Only 1 ID and might only work with my plane**
+**Only 2 IDs**
 
 If a CC2500 is installed it will be used for this sub protocol. Option in this case is used for fine frequency tuning like any CC2500 protocols so check the [Frequency Tuning page](/docs/Frequency_Tuning.md).
 
 If only a NRF24L01 is installed then this sub protocol might be problematic because it is using the xn297L emulation with a transmission speed of 250kbps which doesn't work very well with every NRF24L01, this is an hardware issue with the authenticity and accuracy of the components.
 
-CH1|CH2|CH3|CH4|CH5|CH6|CH7
----|---|---|---|---|---|---
-A|E|T|R|Rate|Mode|Hover
+CH1|CH2|CH3|CH4|CH5|CH6|CH7|CH8
+---|---|---|---|---|---|---|---
+A|E|T|R|Rate|Mode|Hover|Light
 
 The plane does not need to be bound each time if it is powered on **after** the radio/protocol is on.