WIFI Panic Button for Elderly RF 433mhz SOS Bracelet Emergency Alarm Wireless Watch Call Old People Android IOS APP

Specifications: - Technical Parameters: SOS Bracelet (433Mhz, EV1527, 430K), WIFI host (connect 433mhz sensors, connect 2.4G WIFI) - Work Mode: SOS send signal to wifi host, wifi host send smartphone notice via APP, also with local alarm voice and LED flicker - 2.4G WiFi connect directly (not support 5G WiFi) - SOS to alarm host receiving distance: 80 meters (open area), 15 to 30 meters indoor ...