Features two call buttons and two pagers, one of which is a touch screen button, convenient for patients with less strength. Simply press any call button to alert the caregiver via the wireless receiver. The Pager/Chime Unit has 36 ring tones and 5 adjustable volume levels (0db to 110db), with a silent mode option featuring an LED flash. It's easy to use with a plug-and-play receiver that plugs into an electrical outlet. Utilizing adaptive high-frequency technology, it offers better anti-interference than ordinary doorbells and a range of over 600ft/180m in open areas, with strong penetration and signal stability capable of passing through walls. The Transmitter/Push Call Button is easy to carry, can be put in a pocket, or hung as a pendant with the included neck strap. It can also be fixed bedside or in the washing room with the included bracket and double sticker. The Transmitter/Push Call Button is waterproof, suitable for meal splashes, and can be installed in the washing room. Liotoin offers a 3-month money-back promise and a 1-year quality service. Contact customer service for any quality issues.