Rechargeable Wireless Caregiver, Pager Smart Call Button Transmitter with Receiver 1000 Feet Range Nurse Calling Alert Patient Help System for Elderly (1 Call Button and 1 Receiver, Black)

【Stable Signal and Anti Jamming】1000 feet long-distance transmission signal is stable; with enhanced anti-jamming patented pair technology., 【Caller ID, Easy to Expand】The receiver has a caller ID function, which can tell you who is calling for help; the system is expandable to accommodate more receivers and more call buttons., 【Rechargeable】 Equipped with a 500mAh lithium battery with low battery indicator light, the CALL button can be fully charged in about 3 hours, and can be charged for up to 30 days. The receiver fully charges in about 3 hours and lasts up to 30 days o, 【Volume and Tone Adjustable】There are 4 volume levels and 12 tones available; also, the CALL button has a night light for better use., 【Portable】With a lanyard and belt buckle, it is easy to carry.