Product size: 5*2.9*1.2cm Product packaging: boxed Packing size: 10*10*3cm Product features: [Advanced GPS positioning]: Use multiple positioning modes, such as GPS + AGPS + LBS + WIFI. In addition, the quad-band global GSM + GPRS system can ensure that you get accurate location information and fast positioning speed. [Multifunctional]: It supports geofence tracker-, historical location evaluation, SOS, device search, alarm clock, do not disturb mode and pedometer. Help keep your family safe. [Exquisite and exquisite design]: It weighs only 28 grams and is easy to carry. High-quality materials make it strong and durable. With the lanyard, you can tie it around your family’s neck without worrying about losing it. [Remote operation]: Support remote operation, equipped with a high-sensitivity microphone, you can listen to the sound around the tracker- in real time. In addition, you can turn off or restart the tracker- via the remote control. [Security assurance and IP67 protection]: Use the SIM card to activate the product. The alarm function helps ensure its safety. It also has an IP67 protection level to prevent dust and short-term soaking. Specification: Support positioning mode: GPS + AGPS + LBS + WIFI Quad-band system: 850/900/1800/1900 MHz Suitable operating system: Android&iOS Protection level: IP67 Built-in battery type: 3.7V 500mAh lithium battery 802035 Material: ABS Color: blue, red (optional) Item size: approximately. 53 * 27 * 22mm / 2.24 * 1.06 * 0.86in Product weight: 28g / 0.98oz Packing size: 12 * 9 * 3cm / 4.72 * 3.54 * 1.18in Package weight: 104g / 3.66oz Packing list: 1 * GPS tracker- 1 *lanyard 1 *Charging cable 1 *Chinese and English manual How to use: please see the manual Product material: ABS Package list: 1 * GPS tracker- 1 *lanyard 1 *Charging cable 1 *Chinese and English manual Notes: 1. 1 inch = 2.54 cm 2. Please measure it yourself to choose the right size. 3. Due to the difference between the different displays, the picture may not reflect the actual color of the item. Thank you!