Wireless Doorbell Rechargeable Battery Operated 3280.8ft Range 2 Way Voice Intercom Doorbell for Home Hospital Black

Feature: 1. Wireless Voice Intercom Doorbell: No WiFi or internet required, no complicated wiring, just power on and start using immediately. Quick and effortless setup and installation. 2. 1800mAh Battery: Powered by an 1800mAh li battery (built in) that delivers up to 8 months of operating time for the outdoor doorbell transmitter, long lasting reliability. 3. 1000m Long Transfer Range: Strong signal coverage with a transfer distance of up to 1000 meters (open area) and 20 to 50 meters (with obstacles), ensuring you never miss a visitor. 4. Multi Purpose: The wireless 2 way intercom doorbell is suitable for business intercoms, as well as home daily care, bedside nurse call systems, and nighttime emergency alerts. 5. Temperature Range: Reliable performance in harsh conditions with an operating temperature range of 20 degrees C to 55 degrees C, suitable for both cold winters and hot summers. Specification: Item Type: Doorbell Material: ABS Battery Capacity: 1800mAh (Built In) Operating Temperature: 20 degrees C to 55 degrees C Transfer Distance: 1000m 3280.8ft (Open Area), 20 50m 65.6 164ft (With Obstacles) Operating Frequency: 410MHz 490MHz Operating Time: Outdoor Unit 8 Months, Indoor Unit 3 5 Days. Package List: 2 x Call Devices1 x Charging Base1 x Double Sided Adhesive2 x Charging Cables1 x Screwdriver