4 Volume Self powered Wireless Doorbell Transmitter Receiver Kit IP68 Waterproof 1V2 Features:<br style="white-space:normal;" /> Self-powered doorbell does not need any battery at all, press to supply power, economical environmentally friendly. IP68 waterproof and moistureproof, the outdoor doorbell can still work normally even completely immersed in the water for a short time. Super penetrating power, long wireless working distance, easy to receive signals without being affected. Four volume level, simple to adjust according to your own requirements, convenient and reliable. A variety of ringtones are available for you, eliminating your annoyance of always hearing monotonous ringtones. <br style="white-space:normal;" /> Specification:<br style="white-space:normal;" /> Condition: <br style="white-space:normal;" /> Outdoor Unit Power Supply: Self-generated<br style="white-space:normal;" /> Working Temperature: -20 ~ 65°C<br style="white-space:normal;" /> Certificate: CE, FCC, ROHS<br style="white-space:normal;" /> Waterproof: IP68<br style="white-space:normal;" /> Volume Level: 4 levels<br style="white-space:normal;" /> <br style="white-space:normal;" /> Package List:<br style="white-space:normal;" /> 1 * Indoor Receiver<br style="white-space:normal;" /> 1 * User Manual<br style="white-space:normal;" /> 2 * Sticker