Type: GPS Tracker Material: Plastic Network: GSM/GPRS Frequency Range: GSM 850/900/1800/1900MHz Input: AC 110-220V 50/60Hz Battery: Built-in 3.7V 400mAh Li-ion Battery Standby Time: 12 Days Working Time: 4-6 Days GSM Locating Time: 25 Seconds Size: 3.5cm x 2cm x 1.4cm / 1.38" x 0.79" x 0.55" (Approx.)