One-Button SOS Watch Pager

A minimalist, watch-form-factor wireless emergency transmitter built for ease of use by older adults living alone. Constructed from impact-resistant ABS plastic, it integrates a single large SOS button into an intuitive wrist-worn housing. Technical specifications include 433.92 MHz operating frequency (customisable to 315 MHz), 10 mW output power, ±0.2 MHz frequency deviation, and compatibility with standard 1527 encoding receivers. It operates on a 12V 27A battery, consumes just 13 mA, and performs continuously within a temperature range of -10°C to +55°C. Activation is immediate — no lag — and signal transmission reaches up to 100 metres in unobstructed conditions. Designed exclusively as a transmitter, it requires pairing with a compatible 433.92 MHz base station (sold separately). Package contains two units: one black, one white.