Product size: 5.2 * 3.1 * 1.1cm Product packaging: opp Package size: 6 * 3 * 1cm Key Finder uses BT 4.0 technology to connect Android, IOS, compatible with iPad- and other smart phones. Display the distance from you of lost car keys, luggage, wallet, dog and cat on app, so that you can find them accurately. 📍 App remote control: download the free app "ctracing" and pair it with a smartphone. When you press the remote control button, the receiver will beep, and you can hear the GPS Tracker- within 75 feet. 4-piece GPS Tracker- locator includes black, green, blue, pink-, white, suitable for children, pets, phones. 📍 Two way notification: connect this wireless tracker- to keys or wallets we often forget and track their things. The two-way Key Finder allows you to track lost items, or ring or flash when they are out of range. 📍 Finder key chain: the smart tracker- is small in size, light in weight and easy to carry. Just like the key chain on a child's schoolbag or hung on a pet collar, real-time viewing of the locator can effectively avoid the loss of children and pets. The last viewed pushpin is provided on the map through app to help you recover items and search for cars in parking spaces. 📍 Multi function: anti loss alarm, GPS tracking device, remote control self portrait. As a remote shutter for self portrait, you can remotely control your smartphone camera by pressing the viewfinder button. Product description GPS Tracker- Key Finder color is black, green, white, pink-. The app will display the connection location of the lost item, which can help you to remind you of the location of the lost item and find it easily. Specifications: 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 compatible with IPad-: compatible with iPad- 1 / 2 / 3 / 4 or higher, compatible with iPad- mini-2 / 3 / 4 or higher, iTouch 5, compatible with iPad- Pro 3 / 4 or higher, compatible with iPad- air or later. Connect app A - search for "ctrouting" in Google play store or compatible with 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. packing: 4 x Key Finder Usage: please refer to the manual Product material: ABS + electronic components Package list: 4 * tracker- 4 * 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! Small size and light weight, easy for carry. Black shell, perfect for tracking vehicles, teens, spouses, elderly persons or assets. With two powerful magnets inside, easy to attach to vehicle firmly, no extra installation need. All you need is a working SIM card (NOT included!) to insert into the device, then you can track and map (with Google Maps) in real-time over the Internet. Dial SIM card number, then you can hear voice around this tracker, with no light and no noise, you can monitoring and what's going on around the tracker silently and secretly. Voice Recording Function: Send text message 555 to SIM card number, it will reply a message “Snd” and start recording,SIM card and TF card are not included.