This anti-lost adopts bluetooth 4.0 low consumption technology, and through corresponding app to realize all the functions. It can effectively protect your kids, pets or valuables form being stolen or lost within 10m effective distance range, when out of this range your phone and this itag will automatically ring for a timely warning. It can also be used as a excellent remote control seflie shutter and recorder. The location function is extremely perfect for road nerds to exactly find their cars. Benefiting from the built-in low consumption bluetooth 4.0, the battery can last for about 1 year. What's more you can preset 8 devices in one phone at the same time. The ultra small size and light weight ensures maximum convenience and portability. Main features: anti-lost alarm tracer function, you don't have to worry about lost your mobile phone anymore remote control shutter voice recording battery level, tap the battery level button to show the battery level bluetooth: v4.0 working distance: 10m battery: cr 2032 lithium coin battery, last about half a year. With this device you can make any speaker including your car home or even your computer speakers wireless. It will enable you to play Music directly from your phone to your speakers with high quality sound through your phone's Bluetooth. You do not have to throw away your old speakers just invest in this adapter and your old speakers will be bluetooth compatible. NOTE: That this device is powered by usb. You can put this device directly into a usb wall socket for it to work or any other USB port. Features: Lets ordinary speakers instantly become wireless Bluetooth stereo audio music speakers Can be paired to any bluetooth enabled devices, such as mobile phone, laptops, speaker and Bluetooth audio transmitter. Make any speaker play wireless music Instructions for use: Insert the receiver into the speaker's usb interface, and the other end connected.