Specifications: Product size: 5.2 * 3.1 * 1.1cm Product packaging: opp Package size: 6 * 3 * 1cm Viewfinder distance: 0-100 feet BT version: BT 4.0 Color: 1 x Black 1 x green 1 x white 1 x pink-. Battery: including CR2032 lithium coin battery (replaceable). Compatible devices: IOS: version 7.0 or higher Android: version 4.3 or higher IPad-: iPad- 1 / 2 / 3 / 4 or higher iPad- mini-2 / 3 / 4 or higher iTouch 5 iPad- Pro 3 / 4 or higher iPad- air or later. Connect app: A - search for ctrouting in Google play store or Apple- App store or get download link by scanning QR code on package box and then download app; B - press and hold the button on the intelligent locator and the LED light will be on when you hear drop drop twice; C - search the smart locator and connect to the application slide left to delete the tracker- touch the > icon to rename the smart locator or disconnect; D - long press to close. Photo function: Smart locator and application connected: In the camera interface of the application press the button once to take a picture. Package list: 1 * tracker 1 * 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!