ELPA Wireless Door Chime Sensor Set (EWS-S5034) for Caregivers, Offices, and Stores, Wireless, No Wiring Required

〇 Installation is easy as it is a wireless type that requires no wiring! You can add more transmitters and receivers to suit your needs. 〇 Any number of receivers can be added to one transmitter. 〇 The radio wave has a line-of-sight range of approximately 120m. Ideal for paging and alarming applications in homes, stores, and offices. 〇 With approximately 250,000 possible ID codes (identification codes), there is no need to worry about interference. 〇 A lamp will notify you when it is time to replace the batteries in the receiver and transmitter. 〇 20 different alarm sounds can be set to your liking. A different sound can be set for each transmitter, making it possible to distinguish between transmitters by sound. 〇 When the door is opened, a radio wave is transmitted and the receiver will chime to notify you. Volume: Approximately 88dB/50cm. Radio wave range: Line of sight, approximately 120m. Frequency: 313.625MHz (Specified Low-Power Device). ID code: Approximately 250,000 possibilities. Operating temperature range: 0°C to 40°C. Using the device near electrical appliances or office equipment that emit radio waves (noise) may result in malfunction or failure to function.