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1. The doorbell frequency is in line with national regulations and will not produce harmful electromagnetic interference. 2. Easy to install and remove batteries for the outdoor unit, using 4 AAA batteries, and the lifespan can be up to four months, but the battery is not included. 3. The indoor unit does not need batteries and is connected with a USB data cable. 4. Adjustable volume and changeable ringtone, the voice quality is clear and the speaker sound is loud. 5. Easy to install, can attach the doorbell directly to the wall with tape and is less time-consuming. 6. Using learning code to encode, one outdoor unit supports many indoor units, without interference.
Condition: 100% Brand New
Item Type: Doorbell
Color: As the picture shown
Material: ABS plastic
Outdoor unit
Battery Model: 4 AAA batteries for power supply (not included)
Working Temperature: -20-55℃
Transmission Distance: Approx. 200m/218yd from empty space, 5-50m/16.4-164yd from space with obstacles
Working Frequency: 467.6375MHZ
Working Time: Four months
Waterproof Rating: No waterproof function
Indoor unit
Voltage Range: 5V 1A
Working Temperature: -20-55℃
Transmission Distance: Approx. 200m/218yd from empty space, 5-50m/16.4-164yd from space with obstacles
Working Frequency: 467.6375MHZ
Waterproof Rating: No waterproof function
1 x Indoor unit
1 x Outdoor unit
1 x Screwdriver
1 x Description
2 x Adhesive tape