Description

Long Range Operate - it can work within 200-700 feet through the mental security doors and walls ,they can work within 900 feet in open and noninterference environment . you can add additional transmitters or receivers (supports 10 transmitters at most)

52 Different Chimes - there are 52 different ring tones with 4 levels of adjustable ringing volume from 30-110db.the receiver and the transmitter will flash blue light to give a friendly hint

Custom Expansion - you can DIY to meet your requirement by pairing additional receivers and push buttons. Each receiver can be configured with different tones, therewith to tell different visitors from different positions.

Easy To Install - screws and double-sided adhesive tapes included for easy installation of the transmitter .no batteries required for main receiver, just plug the receiver into an electrical outlet. push button can be fixed to the doorframe with the attached adhesive tapes

Waterproof & Temperature Resistance - the push button is rated ip44 weatherproof for outdoor use it can operates normally at temperature between -30℃-70℃/-22℉-158℉