Operational Instructions: 1. Receiver: and hold the touch switch until it turns on, then and hold the switch again to turn it off. Transmitter: Automatically turns on upon power-up. The touch switch can be used to turn the device on and off. 2. The device can be divided into 20 ID groups, with the transmitter and receiver in each group assigned the same ID. Up to 20 transmitters can be used simultaneously. 3. When the transmitter and receiver are connected, the signal indicator light flash. (If it does not flash, the connection between the transmitter and receiver is unsuccessful.) 4. Receiver: Battery-powered: Charges for 3 hours. Use time: 20 hours. Applications: Stage lighting, large-scale theatrical performances, stadium lighting, temporary performances, urban lighting systems, television stations, conference centers, professional theaters, theme parks, dance , bars, small-scale theatrical performances, etc. Lifespan: 10 years ( with display 1T1R) Color: Black Material: ABS Package Contents: 1 * transmitter 1 * receiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.