If you are still worried about yelling at the door or knocking on the door, then the wireless doorbell is your best choice. Never miss a delivery again with the wireless doorbell, which reliably offers you a huge signal range of 300m, 36 different melodies and 4 adjustable volume levels and bring several conveniences into your life. < p>300M long range The range between transmitter and receiver is up to 300 meters! A sufficient radio range makes it possible to install the radio bell anywhere in your villa with 2 floors and garden. Bad weather conditions can be easily survived IP44 waterproof and dustproof, suitable for indoor and outdoor use. The wireless doorbell can be used in the range of -20-65. You don't have to worry about sun, rain, snow or other extreme weather conditions like frost. LED Signal When it rings, the receiver shows one blue LED signal, which is practical for the elderly and the hard of hearing. Battery-operated wireless doorbell with 3 years battery life! Also suitable for outside, as a wireless garden bell or doorbell, etc. Specifications Ringtones: 36 Waterproof (transmitter): IP44< /p> Transmitter: 7.8cm x 4.6cm x 2cm Receiver: 8.0cm x 7.5cm x 2.3cm Operating temperature: -22C~ 65C Volume: adjustable in 4 levels (25db ~ 85db) < p> Input Voltage: AC110-240V 50/60HZ