Brand Twinmask Model MT-90 Color Black Quantity 1 GPS Chip SiRF-Star III GPS Network GSM / GPRS Band 1575.42MHz GSM/GPRS Module SIM 900 (850 / 900 / 1800 / 1900MHz) GPS Sensitivity -159 dBm GPS Accuracy 15 meter Warm Start Time 35 seconds Cold Start Time 37 seconds Hot Start Time 1 second Antenna Built-in antenna Pre-loaded Map Yes Maps Included Google map Screen Size No inch Screen Format No PC Interface Supported USB 2.0 GPS System Features Pets & children & elder tracking; Small size fits anywhere waterproof level: IP67; With clip portable to carry actual positional range: within 10m cell phone and GPRS tracking sync Operation Temperature -20'C~55'C Humidity 5% to 95% non-condensing Altitude Limit 18000 meters Velocity Limit 514 m/sec Memory 2 GB Memory Card Type TF Max Extended Capacity 2GB Battery Type Rechargeable 3.7V 750mAh battery Battery Standby 120 Hour Other Features Support SMS function support set multiple function at the same time support 5 phone numbers connection; Track with specified requirements support vibration alarm; SOS button is for sending emergency help; Support beyond area alarm; Support over speed alarm; Low battery alarm; GSM blind area data storage function; Power saving mode can work for 5 days Certification CE Packing List 1 x Tracker 1 x 100~240V EU plug adapter 1 x 12~24V car charger 1 x USB cable (75cm) 1 x Screwdriver 4 x Screws 1 x Encryption dog 1 x Base 1 x CD