Highlights:?? Portable, palm-sized design; super convenient to carry?? GPRS/GSM dual network real-time locating, high accuracy, no dead zone, nearly covers every corner all over the world?? Multi-language supports: Chinese, English, Russian, Spanish, Portuguese, German, French, Arabic?? Supports single-point and continuous locating?? Supports external TF card (Max 32GB, not included in the box)?? Overspeed alarm notification, improves driving safety?? SOS button for help in case of an emergencyHow to use it:1. Open the back cover, remove the battery; Insert an SD card and a SIM card, make sure the SIM card doesn??t open CF (call forwarding) & CID (caller identification) service.2. Re-install the battery, close the back cover; Bring the GPS tracker outside and long press ON/OFF button till the indicator lights up.3. Initialize the GPS tracker to default setting on first use:- Use your cell phone to send message ??begin + password?? to the SIM card in the GPS tracker, default pass word is ??123456?? (e.g. Send ??begin123456??, the GPS tracker will reply ??begin ok??).- Revise Password: Send ??password + old password + space + new password?? to the GPS tracker. e.g. Send ??password123456 666666??, the GPS tracker will reply ??password ok??. (Notes: All passwords must be 6 Arabic numbers, otherwise the device can??t recognize them.) 4. Normally, the GPS tracker will search & connect to GSM/GPS signals in 10 to 40 seconds and work properly and the indicator will keep blinking every 5 seconds.5. You can revise any setting listed on the User Manual after the GPS tracker successfully receives GPS signals:- Overspeed Alarm Setting: Send message ??speed + password + space + speed limit?? to the GPS tracker. (e.g. Send ??speed123456 80??, when your driving speed is over 80km/h, the GPS tracker will send an alarm message to your cell phone every 3 minutes); Send ??nospeed + password?? to cancel overspeed alarm setting (e.g. Send ??nospeed123456??).- Authorized Cell Phone Setting (Max supports 5 phone numbers): After continuously call the GPS tracker successfully for 10 times, the phone number will be identified as ??Authorized Cell Phone??; You can also set manually: Send message ??admin + password + space + phone number??, the GPS tracker will reply ??admin ok?? (e.g. Send ??admin123456 12345678901??); the other 4 phone numbers can be set by the first authorized cell phone. To cancel authorized cell phone setting, send ??noadmin + password + space + phone number?? (e.g. Send ??noadmin123456 12345678901??). - SOS Function: Long press ??SOS?? button for 3 seconds, the GPS tracker will send message ??Help Me + ?longitude + latitude?? to all the authorized cell phones.- For more other detailed settings, please kindly refer to the User Manual or E-mail us for help Specifications:Item Type: GPS TrackersNetwork: GSM/GPRSBand: GSM 850/900/1800/1900MHz; GPRS Class 12, TCP/IPGPS Locating Time: 45s (cold start); 35s (warm start); 1s (hot start)Battery: 3.7V 1000mAh Rechargeable Li-ion batteryStandby: 10 ~ 15 daysRunning Time: 3 ~ 5 daysAccuracy: 30m (2D RM)Working Temperature: -20 ~ 55??Working Humidity: 5% ~ 95%Dimensions: 6.5*4.5*1.7cm / 2.55*1.77*0.67inWeight: 99gWhat??s in the box:1 * GSM 850/900/1800/1900MHz GPRS TCP/IP Palm-sized Real-time Car Vehicle GPS Tracker w/ SOS + Overspeed Alarm + TF Card Slot 1 * USB Cable1 * 3.7V 1000mAh Rechargeable Li-ion Battery1 * User Manual