New wireless doorbell for the home, self-powered, waterproof, long-distance calling without batteries, for elderly people through walls (white, 2 transmitters + 1 receiver)

General Description The new self-generating wireless doorbell is designed for home use, offering an impressive range of 300 meters in open spaces. With a transmitter and receiver, it is ideal for the elderly, allowing easy communication through walls and doors. Its weatherproof and durable design ensures reliable operation even in harsh weather conditions. Technical Specifications Color: White Weatherproof rating: IP44 (transmitter) Operating temperature: -30°C to +70°C Operating frequency: 433.92 MHz + 75 kHz Receiving voltage: 100-260 V / 50-60 Hz Volume: 0-100 decibels, 4 adjustable levels (25 dB to 85 dB) Number of melodies: 38 Installation The doorbell is easy to install in just two steps: connect the receiver to a power source and attach the transmitter to the wall using the included adhesive strips or screws. The receiver does not require batteries, further simplifying installation. To use the doorbell, simply press the button on the transmitter. The receiver will ring, and a blue LED flash will provide a visual indication, which is especially helpful for the hearing impaired. If re-pairing is necessary, press and hold the volume button for 3 to 5 seconds to enter pairing mode. The product is ready to use right out of the box, having been paired at the factory. To clear the pairing code, unplug the transmitter, press and hold the ring button, and then plug the power back in.