updated professional bed sensor alarm and fall prevention for elderly/dementia and more,caregiver pager motion sensor with 5 volume level (1 caregiver pager) nesthao elderly care alarms:wireless bed alarms for elderly alerts you when you patient gets up from bed and go and assist her to prevent from fall when she stands up motion sensor patien:the wireless caregiver alarm allows caregivers to monitor their movements freely and remotely. the receiver provides two power supply modes: battery and usb c. there is no need to plug the bed alarm receiver into the power supply all the time. you can monitor the movement of the elderly at the first time.