... ,automobile,ship making,high quality,stable function CE,ISO 9001 21-E1B CURRENT SERIESTransmitter and Receiver21-E1B is one of the ... : suitable for wireless remote controlling at long distance of CD, MD, LD, JHHM, BHHM type electric hoist, endless chain electric hoist ... the production efficiency and without blind operation. Wireless remote controller (21-E1B)