2.4G Wireless 2Player Encoder PCB Board General use This encoder PCB board is designed for 2player wireless gaming and is generally used in PC/computer games, multiplayer games, Android smart devices, set boxes game consoles, and similar systems. Two identical boards and indicator lights The two motherboards are identical. The one that powers on first has the P1 indicator light green, while the second PCB motherboard has the P2 indicator light red. When the battery is low, the indicator lights will alarm and the battery needs to be replaced. Sleep mode when not connected If the motherboard is powered on but not connected to the receiver, the red and green lights flash slowly. After flashing for several tens of seconds, it enters sleep mode. Use the MODE/ button to wake up the motherboard. Battery and power guidance The motherboard usually uses two 5V/7V batteries with 3V power, and it is not recommended to use a 3.7V lithium battery. Long term use may burn out the main control chip. If you want to use a rechargeable motherboard, you need to a rechargeable one.