[Long Range Calling] The alarm range of the receiver and emergency call button in the open area is 330 ft/100 m (Because the signal of the emergency life alert pager receiver be interfered by walls or metal, please put it next to the Wi-Fi transmitter to avoid affecting normal use). [Wi-Fi Connection & Smart APP Control] This caregiver pager connects with cell phone through Wi-Fi to realize phone APP remote operation(First connection needs to that the cell phone - pager - call button connection is the same Wi-Fi network environment), no matter how far away it is, the phone can clearly receive the alarm signal after the SOS call button is triggered. Remind caregivers to of the elderly at any time. [Easy to Use] The elderly life alert is easily used by connecting to the power supply via the configured USB Cable without installing batteries. No need to worry about running out of battery power. After pairing the cell phone with the pager, you can set up additional call buttons to match on the cell phone APP according to your specific needs. The phone can add 100 call buttons to work with, and the SOS call button name can be customized for easy differentiation. [Audible/Visual Dual Alarm] When pressing the life caregiver call button in case of emergency, the caregiver pager sound an alarm when it receives the signal, and the built-in LED indicator in the SOS area flash red to alert the caregiver. The emergency alert system has 12 types of ring tones to choose from and 4 adjustable volume levels from 0db to 90db. A silent mode with LED flashing is available. [Wide Application] The life alert button is and portable, with a lanyard design that can be hung around the neck or put in the pocket and waist; it is Waterproof, can be used in the bathroom (Do not wear it in the shower or soak in the water).which is suitable for paralyzed patients / disabled / elderly monitoring / accidental fall patients / hospital bed care / pregnant women, etc., Manufacturer: Akfldms