Plug and Play: Automatic matching system, no setup required.Guitar Mode: Receiver indicator light shows green lightElectric Guitar Mode: Receiver indicator light shows blue light.Step 1: Long press to power on; automatic pairing begins.Step 2: Double-click any power button to switch between the two modes.Step 3: Plug in the transmitter and receiver first, then turn on the amplifier to avoid unnecessary noise caused by metal friction during insertion.Product name: A13 wireless guitar transceiverColor: blackCasing: ABS environmentally friendly materialPlug: gold-plated copperTransmission frequency: 2.4GHzFrequency bandwidth: 20Hz-20KHzTransmission delay: less than 4msBattery capacity: 200mHAVoltage: 3.7VCharging interface: USB C interfaceCharging time: 1.5 hoursBattery life: 5 hoursTransmission distance: 30 metersRotation range: nonePlug: 6.35mm plugProduct size: 8.5*3.4*1.7cm (length*width*height)Packing list: 1 transceiver each + 1 double-head charging cable + 1 kraft paper packaging box + 1 instruction manual