Smart Pet GPS Anti-lost Bluetooth Tracker Bluetooth version: Bluetooth 4.0 2. Compatible mobile phones: iPhone (iOS8.0 and above) and Android system and Bluetooth 4.0 smartphone (Android version 5.0 and above) 3. Working distance: 10 meters 4. Applicable to: wallets, keys, bags, and other items. 5. Size: 5.1*3.1cm 6. Battery: CR2032 lithium coin battery (not included) 7. Color: black, red, silver, fuchsia, gold, green, blue. Features Connect with Bluetooth function of mobile phone, two-way search function. In the connected state, when the anti-lost device exceeds the set Bluetooth range, the mobile phone, and the anti-lost device will alarm at the same time; Up to 10H Mist Time On the mobile phone, you can check the map location when the anti-lost device is disconnected; Provide Do Not Disturb function, which can be set to mute within a certain period of time to prevent interruption at work and other important times; Control the shooting function of the mobile phone through the anti-lost device, and take a selfie remotely. InstaFresh Tech Guarantee We truly appreciate and respect all of our customers, and for this reason, we offer a 100% satisfaction guarantee. If you’re not happy for whatever reason then please email us at firstname.lastname@example.org and we will give you a full refund. Shipping We don’t think you should have to pay for us to ship your product, so we actually offer a free worldwide trackable shipping option for you to enjoy. Just one of the ways we like to show that we care! .