Topvico SOS Panic Button RF 433mhz Emergency Button Elderly Alarm Keychain Controller Old People GSM WIFI Home Alarm System Advantages: - Easy carry with keychain hole, super light - International 433mhz protocol, work with almost all 433mhz alarm system - Long work distance 15 to 30m indoor, 100m outdoor - Super power save, long work time normally more than 12 months Application: Home, hospital, old people, kids... Specifications:Technical Parameters: 433Mhz, EV1527, 430K Working Voltage/Current: DC 12V/14mA Transmitted Power: 10mWModulation Mode: ASK Woke Mode: Send out alarm signal in 0.8s after triggered avoid false alarm Work distance: 15 to 30m indoor, 100m outdoor Power supply: 1*12V/27A battery include, work time more than 12 months for normally use Work Temperature: -25℃~+65℃Size: 67×39×12mm Weight: about 20g Quantitiy: 1~2pcs/L Topvico Caregiver pager - Press the alert button instead of shouting - Need help? Just press the alert button, make it easier for your loved ones to get help Remark:This device must connect to Tuya Host or 433mhz Alarm Host can not work alone ABOUT US TOPVICO Electronic Technology Co., Ltd. is a company focus on Home Security&Automation, established in 2011, pay all attention to provide most desired and competitve goods to our customers, that's why we exist, we are here to make your purchase happy, pleasure to communicate with you and improve by your suggestions, thank you dear customers! SHIPPING - Q: How long your goods will be sent out? A: 98% goods will be sent out within 24 hours, others within 72hours - Q: What delivery method? A: Defalut use