GPS Receiver

Accuracy - 20 meters 50% of the time and 50 meters 95% of the time

Cellular Services

GSM/GPRS

Speaker Phone

Volume - 80 dBA @ 30cm Nominal, 75 dBAmin

Siren

Volume - 90 dBA@ 30 cm Nominal, 85 dBA min

Removable Primary Battery

Type - Li-ion rechargeable - 20 + hours

Secondary Interal Battery

Type - Li-ion rechargeable - 90 min

Physical Characteristics

Size - 3.5" (W) 4" (T) 1.25" (D)

Operating Tmerature - -20 to +60 degrees celsius

Waterproof up to 3 meters

Ankle Strap - Tamper alarms, Hypoallergenic