[Easy to use] One-touch alarm and push notification to mobile phone, which helps prevent accidents. Full mobile phone APP monitoring, push mobile phone APP notification when pressing the button. [Mobile phone control] After pairing Tuya with Smart Life APP, you can monitor in real time through your smartphone. [Applicable people] The multi-function pager is suitable for children, the elderly, pregnant women, patients, disabled people, etc. [Small and light] Small and light, it can be used in various scenes. Just hang it around your neck or stick it on the surface with double-sided tape. [Smart linkage] Can be used in conjunction with other smart life APP devices to trigger an alarm. (Linkage devices need to be purchased separately, available in stores) [Extra long standby] Built-in 400 mAh rechargeable polymer battery, low power consumption, long standby time. One charge is more than 3-6 months of use. [Low battery reminder] Enable the low battery reminder function in Tuya Smart App to find out that the battery is too low in time. [Device sharing] Through the device sharing function, it can be shared with every family member. Quantity:3 PCS Standby current:0.1μA Average current:12mA Built-in battery:polymer battery 3.7V/400mAh Charging time:less than equal 1 hour Wi-Fi:2.4G APP:Smart Life (tuya) Product size:50x50x16mm Product weight:75g Colour:White Material:ABS Package Contents: 3 x Elderly SOS Button