-. Brand : Annke -. Feature : Wireless doorbell, easy-to-install, no wiring needed / Up to 120m operating range to fit homes of all size / Long service life,32 polyphony ring tones / Energy efficiency design - No Batteries Required for Bell Push Working. -. Label : ANNKE -. Manufacturer : ANNKE -. MPN : M107 -. PartNumber : M107 -. ProductGroup : Home Improvement -. ProductTypeName : HOME_LIGHTING_ACCESSORY -. Publisher : ANNKE -. Studio : ANNKE -. Title : ANNKE Battery-Free Wireless Doorbell,Up to 120m operating range to fit homes of all size