Working mode introduction: Instant mode: default mode, upload data for when in motion, and not upload data when in dormancy Power saving mode: upload data for 10 minutes when in motion, and not upload data when in dormancy Super power saving mode: upload data when in motion or in dormancy, upload by name on APP Timed mode: can set 1-24h time period, scheduled upload Vehicle start status reminder Start reminder: send start reminder when vehicle starts Stop reminder: send stop reminder when vehicle turns off GSM/GPRS module: MTK2503D GPS sensitivity: -161dBm GPS accuracy: within 5 meters First start time: Cold start 45-120 seconds Warm start 35 seconds Hot start 1 second Vehicle charging voltage: 12-24V input 5V output Handheld charging voltage: 110-220V input 5V output Battery: rechargeable 3.7V Storage temperature: -40C to +60C Working temperature: -20C to +45C Humidity: 5%--95% non-condensing Tips: The product may be updated constantly, Due to Different Batches, The Actual Product May Have Slight Differences or Color Differences, Which Does Not Affect Use Colour:Black Material:plastic Package Contents: 1 x 4G GPS Tracker Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.