Portable Wireless Voice Intercom Two-Way Talk Doorbell Mobile Indoor/Outdoor Chime Interphone System Home Security System

Specifications: Outdoor-bell/Indoor-bell Working voltage:  4*alkaline battery (1.5V*4), rechargeable Li-ion battery Working temperature: -20 ~55 ℃, -20 ~55 ℃  Wireless distance: 300M（w/o any obstacle), 50-100M（w/obstacle) Wireless Frequency: 467.6375M Hz Working time: six months, 48 hours Size: 10.0*6.0*1.5cm/3.9*2.4*0.6in IP level: N/A Package Weight: 152g/5.4oz Package List: 1 * Outside Doorbell 1 * Inner Doorbell 1 * User Manual 2 * Sticker 1 * USB Cable for Charge How to Install: Outdoor-bell: 1. Remove the battery cover, install 4pcs No.7 batteries. 2. Close the battery cover. 3. Press the Ring Button, LED around the Ring Button light on, it means the device is installed well. 4. Screw up the device. Indoor-bell: 1. Slide power switch to ON. 2. Press the Answer Button, device sound "du du......", it means device is installed well. Pair method: 1. Turn indoorbell on and hold Answer Button for about 5 seconds, then release this button, LED flash quickly, now, click the Ring Button on the outdoor-bell. 2. When LED on theindoor-bell go out, it means they pair successfully. Indicator for low power: 1. Outdoorbell: LED flash slowly, please replace the battery. 2. Inndoorbell, LED flash slowly, please recharge it 3. For indoorbell, please connect to power source all the time. Installation: Put the tape with double side glue on the wall, then put our door bell on the tape.