Type:Gps Tracker Use:Automotive Screen Size:without Function:GPS Tracking Warranty:1 Years Color:Black Size:99 (L) X 52 (W) X 16 (H) mm Weight:82g GSM frequenc 1900MHz GPRS:Class 12, TCP IP built-in GSM module GPS:MT3326 Frequency:L1, 1575.42MHz C A code GSM antenna:built-in quad band GPS antenna:built-in GPS high gain ceramics patch antenna GPS Channels:20