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

Specification : Indoor-bell: Power supply: built-in rechargeable Li-ion battery Transmission distance: 50-100m(without any obstacle) Work time: 48 hours Wireless frequency: 467.6375 mhz Working temperature: -20 to +55 Size:100mm*54mm*20mm Outdoor-bell: Power supply: 4 x AAA Battery(not included) Transmission distance: 300m (without any obstacle) Work time: 6 months Wireless frequency: 467.6375 mhz Working temperature: -20 ~ +55 Net weight: approx. 55g Gross weight: approx. 150g Product size: approx. 100*60*15mm/3.93*2.36*0.59'' Gross weight: approx 165*118*24mm/6.49*4.64*0.94'' Color: Silver Size:100mm*60mm*14.8mm Applicable scence:Home.Factory.Hotel.Hospital.Store.Office.etc. Operational principle 1.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 screwdriver and remove the battery cover. 2. Install 4*AAA battery. 3.Install the battery cover and screw on it. 4.Press the intercom button: a.The button light is on, indicating that the machine is normal. b.The button light does not light, indicating that the battery is not installed. c.If the battery is reversed, it will ring, but it will not talk properly. Indoor unit: Press and hold the power button for 3 seconds - after the intercom light flashes a few times, press the intercom button to make a "dudu" sound indicating normal. Low battery prompt: Outdoor unit: When the outdoor unit is pressed, the red light flashes, and the low power indicator of the indoor unit also flashes red and the sound of "dudu" is emitted.Indoor unit:The low power indicator flashes green and a "dudu" sound is emitted. Package includeds : 1 x Indoor unit 1 x Outdoor unit 1 x Screwdriver 1 x Double-sided tape 1 x Charging Cable Details pictures :