2 Transmitters 8 Channels Hoist Crane Radio Remote Controller System 110v 1. There are 8 Channels control hoist crane remote control system.(UP/DOWN/STARTALARM/STOP/WEST/EAST 2. Tiny size & light weight make it easy to carry. 3. Anti-interference. 4. The receiver with a one meter long cable. 5. The machine with battery voltage warning system, it will automatic power off when insufficient vo