Easy-to-install and DIY home security system, which is perfect for your office, apartment or home. There are 36 chimes with 3 levels of adjustable ringing volume(High / Medium / Low) from 25-110 dB, you can choose what you like. In addition, there are 3 modes available (Sound/LED Flash/Sound and LED Flash). The LED Flash mode is designed for someone who has a hearing problem or when ringing is not required. Works up to 500 Feet
