TDOO Wireless Doorbell,IP65 Waterproof Door Bell Battery Operated at 1000 ft with 2 Plug in Receivers Kit 1 Chime transmitter Remote Button,45 Chimes 4 Volume with LED, Loud Enough for Home Classroom,

45 Melodies with 4-Level of Adjustable Volume: The wireless doorbell offers a wide selection of 45 chimes for your choice. 4-level of volume range from 0 dB to 110dB.
High Performance Transmitter: Remote transmitter button is IP44 waterproof rating, works between -4 °F to 140 °F, withstands various harsh weather conditions. The doorbell chime is suitable for any scene home, townhouse, apartment, office, school, hospital, hotel etc.
Operating range of over 1000 ft in open area: Either you are occupied in the bedroom or at the kitchen, our wireless doorbell kit can remind you that someone is calling from outside. Never worry about missing visitors.
Easy Installation and Movable: Simply plug the main doorbell chime into a wall outlet, install the push button with provided double sided tape or screws. With simply plug in receivers,you can move the doorbell chime anywhere at home.
Memory Function: convenient and easy to use design for a better user experience. If paired with multiple push units in one system, the chime can be set individually for each push unit.