http://www.weihuagrpcrane.com/crane-accessories/ Control Handle Overview Protection level: IP65 Transmitter power supply: DC 6V (4 alkaline No. 5 batteries can be used for 1 month) Receiver power supply: AC 220V/380V, or AC, DC 12V Features 1. Anti-interference, large crystal oscillator above 100; 2. Programmable output settings, up to 16 output points; 3. Nylon-reinforced reinforced plastic case to prevent damage caused by falling and strong collision; 4. Operating distance can be 100 meters.Crane Accessories for sale website:http://www.weihuagrpcrane.com/crane-accessories/