Item Type: Electric Rolling Door Remote Control Remote Control Power Supply: Built in 23A 12V lithium battery, capacity 50mah Remote Control Distance: Approx. 50meter / 164ft Reception Rate: 1Mbps Can connect to mobile app for remote control Package List 1 x Controller 2 x Remote Control 2 x Remote Control Hanging Ring 1SAFE LINE: Wireless remote control adopt four relays(or contactors) control line, standard design, standard manufacturing, electrical performance is reliable and safe 2OVERLOAD PROTECTION: Wireless remote control motor with 110 thermal protection function, automatic stop protection in case of abnormal overload, the machine temperature drop to 70 can resume normal operation 3ACCURATE AND SMOOTH: Electric rolling door remote control brake smooth and reliable, accurate travel limit control and positioning; Double limit protection is configured to prevent the roll door from hitting the top 4MANUAL SWITCHING: The remote control of the door rolling machine has a hand, electric automatic switching device, which can be manually opened and closed when the power is off or maintained and adjusted 5ENERGY SAVING AND LOW NOISE: Electric rolling door wireless remote control is powerful, light weight, low noise and low energy consumption. Equipped with broken chain fall protection device 6BEAUTIFUL AND DURABLE: Electric rolling shutter remote control is easy to install and debug, with compact and beautiful design, stable quality and durable