... 433MHz, up to 10 meters remote control distance and effective, using a unique digital code, no interference with others, and meet FCC ... vibration-proof design;4.Battery self-check function, low voltage protection;5.Using polymer lithium electricity supply,super long standby time, one ... controlled manner;7.Polymer lithium-powered, ultra-long standby time, a charge can continue to work 50 hours or more;8 ...