The Default silver, if need golden, both please leave message when buy.
Color: silver and gold.
Indoor machine: lithium battery
The door machine:AAA batteries* 4
Working temperature: 55 ° ~ 20 ° C - C
Transmission distance: Open environment distance about 200 meters, Complex environment distance from 20 to 50 meters (environment)
Operating frequency: 467.6375 MHZ
Installation method: 3 m adhesive