- Adopted premium abs shell material, fireproof and antiflaming, sturdy and , long life service
- 90dB build-in loudspeaker, produce clear and loud ding dong playing bell sound, not afraid of can’t hear doorbell
- External wired door bell for security access control
- Easy to install, wall-mounted or double-sided adhesive paste
- No need to replace or add battery, using access control power supply, which is eco-friendly, convenient and save money
