Quantity   Component name
1 × APRS GPS position encoder Decodes any NMEA-0183 compatible serial GPS sending $GPRMC or $GPGGA sentences. Transmits position, altitude, speed, heading, and timestamp (hour/minute/seconds or day/hour/minute). Supports SmartBeaconing, which adjusts transmission rates to speed and turning. Can transmit position in MIC-E, NMEA, or APRS ASCII text format. Burst after voice / Send Position Now input. Handles position resolution down to 7 inches.
1 × Byonics GPS5OEM GPS receiver module Size is 32mm x 32mm x 9mm, 0.7 oz
1 × Antenna to be concealed in bracelet or necklace 50 W 2.5 dB gain 144 / 440 MHZ frequency 9 cm length
1 × 12v power supply Providing short 2 amp pulses For 8 to 10 watt output
1 × Radio tranceiver Miniaturized 144/440 MHZ FM radio
1 × Battery 7.4 Volt 2000 mAh Lithium Ion battery
1 × Magnetometer
1 × Accelerometer