【Long Range & Stronger Signal】Works in open areas within 300 meters, this doorbell's signal penetrates obstacles very well. You can connect the receiver anywhere in your home. No radio interference. 【Super Easy Installation】The receiver requires no assembly or batteries; simply plug it into a power 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 harmless. The transmitter is IP44 waterproof and suitable for outdoor use. Protects against dust, rain, and high temperatures. No electromagnetic radiation. CE certified. 【Energy Saving and Long Lifespan】Low power consumption, energy saving, and long lifespan. The transmitter battery can be used for more than 15 months. The transmitter can support more than 100,000 clicks. 【LED Indicator】Both the doorbell (transmitter) and receivers are equipped with LED