Specification:
Item Type: Intercom Doorbells
Material: ABS
Uses:Used in Homes, Hotels, Villas, Factories and Hospitals.
Outdoor Doorbell:
Type of Battery:2 x Rechargeable Lithium Battery 2000mah(built in)
Working Temperature: -20℃-50℃
Distance: 1000m (Barrier ) /20-50m (Barrier)
Frequency: 410-490mhz
Working Hours: More Than Six Months
Waterproof Grade: IP54
Product Size:Approx. 121.5 x 61.5 x 313.mm / 4.8 x 2.4 x 1.2in
Indoor Doorbell:
Working Hours: About 1 Week.
Waterproof Grade: N/A
Size:Approx. 125 x 70 x 56mm / 4.9 x 2.8 x 2.2in

Package List:
1 x Outdoor Machine
1 x Indoor Machine
1 x Charging Base
2 x USB Cable
1 x Screwdriver
1 x User Manual

Note:
1.Indoor and outdoor units are shipped with built in batteries.2.Do not place the product in an environment with excessive , humidity and high temperature.
DISTANCE: The barrier distance of voice intercom doorbells is about 1,000 meters, which requires no internet, no wiring, and can be turned on and used.
INTELLIGENT DESIGN: Voice intercom doorbells adopt intelligent and humanized design, with intercom light and power light display, and the operation is clear at a .
WORKING TIME: The outdoor unit and the indoor unit both use 2000mAh batteries, and the outdoor doorbells work normally. It can work for about 6 months by pressing 5 times a day and talking for 2 minutes at a time, and the indoor doorbells work for about 1 week.
EXCELLENT CHIP: voice intercom doorbells adopt a special intelligent intercom chip with strong penetrating power , which can be used from the 1st floor to the 8th floor.
WIDE APPLICATION: intercom doorbells is widely used in homes, hotels, villas, factories, hospitals, etc.