Traditional Mechanial Ding Dong Wired Doorbell

Product Feature  - Mechanical door bell chime. - aesthetic design -Compatiable with Advent wired bell push button, bell push button is an optional accessory. - Pleasant ding-dong sound, it won't disturb your pets, kids or neighbours - Easy surface mount, the doorbell is very easy to assemble, and the package include user manual for user's reference, 2pcs assemble screws and anchors for users to assemble the product. - Easy wire connetion, there is arrows inside, just connect the wires per the arrows and instruction. - Good ABS material, durable for long-time usiing. - Snap-on cover, Easy to install the cover, just place the cover over the chime, and push to snap into place. - one year warranty, we provide one year warranty for all our products. - 4 options power supply of this door bell wired ring chime.    1) 220V AC direct connecton 2) 8/12V DC external transformer (not supplied) 3) 1*9V battery operated…