【Long Range & Stronger Signal】Works within a 300-meter radius in open space; the signal from this doorbell penetrates obstacles very well. You can connect the receiver anywhere you want in your home. No wireless interference issues. 【Super Easy Installation】The receiver requires no mounting or batteries; simply plug it into an electrical outlet. The transmitter can be mounted on the front door with the included screws or attached to the door with the included adhesive. 【Excellent Quality & IP44 Waterproof】This doorbell is made of ABS material, which is non-toxic and safe. The transmitter is IP44 waterproof and suitable for outdoor use. It protects against dust, rain, and high temperatures. There is no electromagnetic radiation. CE certified. 【Energy Saving & Long Lifespan】Low power consumption, energy saving, and long-lasting use. The transmitter battery can be used for more than 15 months. The transmitter can withstand more than 100,000 clicks. [LED Indicator] The doorbell