The DM-16 transmitter is equipped with an advanced electrical circuit, which continues to flash up to 10,000 times. The receiver is used with alternating current and gets fast response under advanced MCU control. Technical features: - Channels: 16 - Transmitter frequency: 433MHz - Power: AC receiver: 100-240V; 50 / 60Hz 12V 23A transmitter (included) - External operating distance: about 30m - Internal operating distance: about 20m - Synchronization speed: 1/200 sec - Transmitter size: 72 x 40 x 33mm - Receiver size: 72 x 59 x 34mm