Spec:
Item Type: Wireless 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?
Transmission 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
Item Type: Wireless 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?
Transmission 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
