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The medical alarm button is designed for the personal alert in the event of needing help and being unable to make that vital call. Once the emergency occurs, the detector can be triggered to wirelessly transmit the signal to the host so as to achieve the effect of emergency call. It can be not only used as a personal safety alarm but also as a personal security alarm or as a panic alarm in the event of hearing intruders entering the home. It's suitable for all the places where the security alarm is needed. such as residential areas, companies, shopping malls, hospitals, banks, guard post etc. Features Dual alarm types: press the button and pull the necklace. Compact, lightweight and comfortable to wear. Zero Standby power consumption. Low-battery detection. MCU coding, compatible with 2262/1527. Anti-RFI (20V/m-1GHz) SMT Process. Specification Operation Voltage 3V (1 x CR2032 button cell) Standby Current 0uA Alarm Current ≤25mA Alarm Indicator red LED Low-battery Indicator rapid flash of red LED Transmitting Frequency 315MHz or 433MHz Transmitting Distance 50M to 100M Temp. -10 °C-+50°C Humidity ≤80% RH (no congelation) Dimension 36 x 58 x 15mm