One to one digital display for quicker help request: It can be used to of the elderly, pregnant women and people, in care centers, or in business premises together, each button corresponds to a digital display, which can clearly let you know which room is you to help. 55 Ringtones & 5 Volumes & LED Number Display: The receiver is equipped with 55 different styles of ringtones to choose from. You can program each panic button with your own sound. 5 levels of adjustable volume from silent to noisy (0dB to 110dB), you don't have to worry about not hearing the sound. LED indicator can show different numbers to help you easily distinguish who is calling (1-9 numbers display, 1 receiver supports up to 9 SOS buttons). Long reception range up to 1000Ft/300m and expandable: This nurse call system has a large signal reception range. It can be used in a 2 or 3 story house. It can also be paired with other receivers or call buttons to expand your range of use. Flexible expansion plan: If you need more transmitters or receivers to join during use, contact us to purchase corresponding accessories and you can easily pair them together to work. Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage: AC220V Color: White Material: ABS Package Contents: 2*Transmitter 1*Receiver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.