Features: 1. Real time positioning: real-time dog location can be checked on APP map, device location frequency, the default location upload time is every 10 minutes. 2. Safety fence: set pet travel range on mobile phone APP. Once pets come out of the setting area, it will automatically alert the owner. Voice call: you can call the dog through the APP remote end. 3. Footprint tracking: you can find out where the dog has been in the past three months. 4. Low power alarm: mobile APP will display the percentage of real time electricity and remind to charge timely. 5. Deep waterproof: IP67 level waterproof, rain proof and dustproof. Wear resistant collar: the collar is tough, tensile and anti pulling. Specification: Condition:100% Brand New Material: ABS+PC Color: White, Blue, Black(optional) Size: approx.34.5*64*15.5mm/1.4*2.5*0.6in Collar Length: approx.77cm/30.3in(Adjustable) Weight: Approx.165g/5.8oz Package list: 1 * Pet Security Collar 1 * Screwdriver 4 * Screws 1 * USB Cable Note: 1. Only support 2G network, it can't be used if the area doesn't have 2G network, for example Japan, South Korea, Australia, Taiwan and Singapore cannot use it. 2. Please follow the instruction steps. 3. Please allow 0~1 inch error due to manual measurement. Thanks for your understanding. 4. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.