[NO NEED BATTERY] BRITZ Wireless Kinetic Battery-Free Self-Powered Doorbell Door Bell SET [RECEIVER + BATTERY FREE SWITCH] HDB BTO [K616DC] / FREE Adhesive Tape + Screw / [FAST SHIP OUT 1-2 Working Day]

BRITZ WIRELESS DOORBELL K616DCEasy to install with screws / adhesive tape.Strong anti-interference and jamming system to prevent false triggering and interference.Wireless Battery-Free remote control reaches 150m at straight distance and up to 50m with any obstacles during the course of transmission.Easy to use and install.Ideal for homes, offices, factories, hospitals and guest rooms in hotel.Also used as notifying alarms catered to patients and elderly people.Complies with IMDA standards DA102832INSTALLATION INSTRUCTIONS1. Open the cover of the receiver and load 3 x AA batteries (Not Included)2. Transmitter Is Kinetic and Battery Free3. Fix the transmitter on the wall near the door4. Avoid placing the transmitter near high temperature, moist area, metal or electromagnetic surfaces.5. Replace the battery if receiver is not functioning properly