200M 1 Button Waterproof Desktop Wireless Calling Button / Transmitter (Model 0021215) 1CH Wireless Control DC Motor Kit 1) Setting Self-locking mode: Short

1) Setting Self-locking mode: Short pins number 2 and 3 with a jumper cap

Unless you only have 12V power supply available

Operating Voltage: 12V (1 x 23A-12V battery

If you want a longer working time

200M 1 Button Waterproof Desktop Wireless Calling Button / Transmitter (Model 0021215) 1CH Wireless Control DC Motor Kit 1) Setting Self-locking mode: ShortRemote control calling system is the hi tech electronic product which is integrated wireless communication and computer technology. It includes calling button and calling receiver. Each system have one calling receiver and many calling buttons. When there is a calling from a calling button, calling receiver will display corresponding number. It is widely applied to restaurants, coffee shops, karaoke rooms, discos, sauna rooms, beer houses, pubs, night