Voltage Range: AC 110V/240V
Input Voltage: AC 100-240V
Operating frequency: 433.92MHz±200KHz
Family housing, office buildings, hospitals, restaurants, etc.
1000ft Operating Range:
Operating range up to 1000 feet in open area ensures you to hear the bell and answer the door in time.
3 Volume Levels
There are 28 chimes with 3 levels of adjustable ringing volume(High / Medium / Low) from 25-110 dB, you can choose what you like.
For any possible defective products, please contact us first, we will offer you a replacement or refund you.