10 pcs/Pack for SU-669-S Vibration Sound Light Prompts Paging Queue System Receiver Item Type: Receiver Size: About 80 x 80 x 10mm / 3.1 x 3.1 x 0.4in Working Voltage: DC3.7V (Rechargeable Battery) Charging Voltage: DC5V 4A Working Frequency: 433.92MHZ Working Current: 75±10mA Standby Current: <12mA±3mA Decoding Method: Learning Code Battery Capacity: 360mAh Function: Smart charging, low battery prompt, online search, vibration, sound, light rotation, free to switch prompts, can replace the damaged receiver, up to 999 discs How to pair the receiver with the keyboard transmitter: 1. Boot Method: Press and hold the key to boot, the LED light flashes to prove that it is turned on and enters the standby state. 2. Recording Method: You can use the PIN card or toothpick and other slender items to poke the learn button. The LED light can be released. At this time, press the number to be set on the keyboard transmitter. The disc receiver receives the signal and the indicator light. Blinks and beeps, that is, the recording is successful (the recording code is unsuccessful, the number is cleared first and then restarted) 3. Clear the Number: Long press the RESET button, the LED light will turn off after the light is turned off, and the clearing is successful. 4. Shutdown Method: press the power button for 5 seconds, the buzzer light will be on.