Product Specification: -- Type: Magnetic GPS Locator -- Color: Black -- Dimension: 1.57x0.91x0.63inch(40x23x16mm) -- Talk Time: 150 - 180 minutes -- Working Time: 4 - 6 days -- Expansion Card: Mini TF card -- Network: GSM/GPRS -- GSM Band: 850/900/1800/1900Mh -- GMS Locating Time: 25 Seconds -- Power Input: AC 110-220V 50/60Hz -- Power Output: DC5V 300 - 500mA -- Battery Capacity: 3.7V 400mAh Li-ion Battery -- Working Voltage: 3.4 - 4.2V DC -- Storage Temp.: 40 to 85 Celsius -- Operation Temp.: 20 to 55 Celsius HOW TO USE: ☀ Insert working SIM card into the tracker, then track and map(with Google maps) in real-time over the internet ☀ Monitoring by sending text messages to the tracker☀ Send 000 to connect cell phone with the GPS ☀ Send 777 to receive the location via a link to Google Map☀ Send 102 for a link to download the app and username and password ☀ Send 555 to start recording ☀ Send 666 to stop recording and switch to sound sensor mode. Under this mode, if the device is surrounded by higher than 40db voice it will call your phone ☀ Send 445 to delete recording on TF card ☀ Send 444 to reset phone number ☀ Send 888 to check the GPS status (battery, signal, and TF card storage, etc) ☀ Send 999 to restart the GPS Notes: -- Charging requires a SIM card to be inserted, otherwise charging cannot be achieved. Package Content: 1 x Mini Magnetic GPS Tracker 1 x USB Charging Cable 1 x User Manual Our guarantee: --If any of the GPS Tracker are invalid, please contact us. We will send you a new product, the original product does not need to be returned. --If you have any questions during the purchase process, please contact us in time. If there is a problem with the quality, we guarantee a refund.