Features: Outdoor-bell is power supplied by 4pcs alkaline battery(not included), 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 inter phone. Long wireless distance up to 200m Easily installed with 3M tape on the wall Outdoor-bell pair with indoor-bell by learning its code, 1 outdoor-bell can paired with N indoor-bells and no interference each other 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℃ ~ +55℃ Outdoor-bell: Power supply: 4 x AAA Battery(not included) Transmission distance: 200m (without any obstacle) Work time: 6 months Wireless frequency: 467.6375 mhz Working temperature: -20℃ ~ +55℃ Net weight: approx. 55g Gross weight: approx. 150g Note: Please allow 1-3mm differs due to manual measurement Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding. Package Includes: 1 x Outdoor Bell 1 x Indoor Bell 1 x Data Cable 1 x Screwdriver 2 x Fixed Paste
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