Working based on existing GSM/GPRS network and Global Positioning System satellites, this product can locate and monitor any remote targets by SMS, APP and Internet. Features: Built-in 3.7V 5000mAh li-ion battery support standby time. 5pcs built-in magnets, compact size with strong powerful magnetic, can be very easily installed. Real time free tracking, GSM/GPS dual mode positioning, positioning accuracy of up to 5m. Electronic fence, over speed, low power alarm, voice monitor. Track the location of the lost or stolen pets, children, the elderly and vehicles. IPX6 waterproof design, no need to worry about the rainy days. Specification: Color: black Network: GSM/GPS Global Positioning System sensitivity: -159dBm Global Positioning System accuracy: 5m Input: 5V-1A Battery: 3.7V 5000mAh Lithium Battery Humidity: 5%-95% non-condensing Item size: 90 * 72 * 22mm / 3.5 * 2.8 * 0.9in Item weight: 168g / 5.9ounce Package size: 130 * 100 * 60mm / 5.1 * 3.9 * 2.4in Package weight: 313g / 11.0ounce Packing List: 1 * Locator 1 * Storage Bag 1 * Power Cable 1 * User Manual