【Long Range & Stronger Signal】The signal of this doorbell works in open areas within 300 meters and can penetrate obstacles well. You can connect the receiver anywhere in your home. No need to worry about radio interference. 【Super Easy Installation】The receiver requires no assembly or batteries; simply plug it into a power outlet. The transmitter can be attached to the front door with the included screws or glued to the door with the included adhesive. 【Excellent Quality & IP44 Waterproof】This doorbell is made of ABS material, is non-toxic and safe. The transmitter is IP44 waterproof and suitable for outdoor use. Dustproof, rainproof, and high-temperature resistant. No electromagnetic radiation. CE certified. 【Energy Saving and Long Lifespan】Low power consumption, energy saving, and long-lasting. The transmitter battery can be used for more than 15 months. The transmitter can withstand more than 100,000 clicks. 【LED Indicator】Both the doorbell (transmitter) and the receiver are