Description: This wireless voice doorbell talk with visitor via two-way voice intercom,know who visit your home, speak to them and let them know I'm coming, please wait. Low power consumption, long standby time for outdoor-bell up to six months. Exquisite, small, beautiful, and high grade. Why not have a look? Features: Wireless voice doorbell, talk with visitor via two-way voice intercom,know who visit your home, speak to them and let them know I'm coming, please wait. Comply with rulers and regulations related to FCC, CE. Outdoor-bell is power supplied by 3pcs alkaline battery, easy to replace the battery, indoor-bell is power supplied by rechargeable Li-ion battery. Low power consumption, long standby time for outdoor-bell up to six months. Big and adjustable speaker, clear voice, can be used as mobile interphone. Long wireless distance up to 200M -Strong and stable signal transmission in big house, cover range up to 200M（without any obstacle, any block). It is super convenient to answer the doorbell of the visitor at any distance in your room. Specification: Item Type: Wireless Intercom Doorbell. Material: Plastic Metallic materials. Color(Optional): H7A-WG, H7A-WS,H7A-BG,H7A-BS. Package Weight: 208g. Outdoor Unit: Working voltage: 3*alkaline battery (1.5V*3). Working temperature: -20-55 degrees. Transmission distance: 200 meters in space, obstacles 50-100 meters. Working frequency 467MHZ. Working time: more than six months. Package included: 1 x Indoor walkie-talkie. 1 x Outdoor walkie talkie. 1 x USB interface cable. 1 x Screwdriver