The electronic welcome doorbell uses advanced microcomputer manufacturing technology and adopts fully automatic light sensing function. It has excellent performance, energy saving and easy use. Specially designed no cross-reverberation device, until the beautiful music ends, the sensitivity is strong. It is more suitable for the needs of the market and closer to the lives of consumers. It can be used in office buildings, homes, shops, factories and other places, and it also brings unexpected happiness and security. Multiple sounds to choose from: A. Welcome B. Sixteen pieces of music. Instructions for use: Install three AA 1.5V batteries. The machine consumes very little. The battery can be used for more than 2 months. Hang the electronic welcome doorbell by the door. , pull the switch to the voice file or music file. When a guest enters, the electronic welcome doorbell will emit a previously selected sound. The light control distance is 3-7 meters, which is suitable for use in normal light environments and is recommended for use in places with sufficient light.