1. Remote Operation: This intercom can be used at a long distance of about 1500 meters, without network, without wiring, turn on and use.
2. Various Functions: The intercom has internal waterproof design, equipped with large capacity battery, with 2 charging methods.
3. Indicator Light: This doorbell has a good feel of the keys, with intercom light and power light display, the user can see at a .
4. Large Battery Capacity: The doorbell adopts intelligent power saving chip, which can be used for more than half a year under normal circumstances after a full .
5. Multiple Modes: With two indoor units, you can switch between ringing call mode and intercom mode, when the intercom is used.

Spec:
Item Type: Intercom Doorbell
Material: ABS
Battery:
Inner Rechargeable Lithium Battery: 3.7V 2000mAh (with built in battery)
External Rechargeable Lithium Battery: 3.7V 2000mAh (with built in battery)
Use: Widely used in home, office, laboratory environment, etc., medical
Working Temperature: -20℃-55℃
Distance: 1000m in the open, 20-50m across the wall
Operating Frequency: 410M-490M

How to Use:
Installed and turn on and use

Package List:
2 x Inner Doorbell
1 x Outer Doorbell
2 x Charger
2 x USB Cable
1 x Power Cable
1 x Screwdriver
1 x Instruction