Metal doorbell chime, small, anti-interference, easy to install for school hospital laboratory

Features:1. Made of high-quality material for durability and stability.
2. The wired doorbell is not affected by any signal interference.
3. You can extend the wire for flexible installation.
4. Small in size and easy to install; double-sided adhesive tape can be used to attach it to the wall.
5. Two AAA batteries, energy-saving, easy to replace.
Specifications:Features:
Made of high-quality material for durability and stability.
The wired doorbell is not affected by any signal interference.
You can extend the wire for flexible installation.
Small size and convenient installation; double-sided adhesive tape can be used to attach it to the wall.
Two AAA batteries, energy-saving, easy to replace.
Specifications:
Condition: Brand new
Color: As shown in the picture
Material: ABS
Installation: Wall-mounted
Battery: 2 * AAA batteries (not included)
Package list:
1 * Doorbell