Wireless Voice Intercom Doorbell Battery Mobile 200M Outdoor Transmitter with Indoor Receiver

Specification Indoor bell Power supply built in rechargeable Li ion batteryTransmission distance 50 100m without any obstacle Work time 48 hoursWireless frequency 467 6375 mhzWorking temperature 20℃ to 55℃Size 100mm 54mm 20mmOutdoor bell Power supply 4 x AAA Battery not included Transmission distance 300m without any obstacle Work time 6 months Wireless frequency 467 6375 mhzWorking temperature 20℃ 55℃ Net weight approx 55g Gross weight approx 150g Product size approx 100 60 15mm 3 93 2 36 0 59Gross weight approx 165 118 24mm 6 49 4 64 0 94 Color Silver Size 100mm 60mm 14 8mmApplicable scence Home Factory Hotel Hospital Store Office etc Operational principle1 When the indoor unit is turned on it can receive the signal from the outdoor unit and when it is turned off it cannot receive the signal 2 Press the outdoor unit and the indoor unit presses the dialogue button to talk 3 Low battery indicator When the outdoor unit is low the red light flashes and when the indoor unit is low the green light flashes 4 Intercom indicator a When the indoor unit receives the signal from the outdoor unit the green light flashes b When two indoor units appear at the same time press the internal pager they can call each other when the indoor unit calls another indoor unit the indoor opportunity to make a call lights up red and the indoor opportunity to receive the call lights up in blue Installation matters Outdoor unit 1 Unscrew the screw with a screwdriv