Take your music on the go with this portable speaker! It is compatible with all Bluetooth devise such as Smartphones PC and Tablets! This device is great for any occasion when you want music on the go without the hassle of wires.You can listen to your music anywhere! This speaker also has the ability to play music from a microSD memory card. Along with music playing capabilities， this speaker also has a built in microphone and call button. Its easy to both listen to music and take phone calls on your phone using this speaker.___________Features:-Wireless portable mini Bluetooth stereo speaker system.-Handfree MIC.-Rotate adjust voice.-FM Radio function.-Saves you from the hassle of tangled wires.-With micro SD TF card slot， you can play mp3 / mp4 format files in the TF card.Expanded BXS (Bass Xpansion System) drives a fuller， richer low-end response.-Built in rechargeable battery ， charged by computer via USB interface.-Compact and portable， convenient to carry.Note:Sound Quality is better when TF/ micro SD card is played. Files in SD card should be all in mp3 / mp4 format.Speaker may recognize micro SD insertion but if the files contain mix of MP3 and MP4， the speaker may not play music correctlyin order.You can plug this speaker to any AUX (speaker) interface such as MP3 player/MP4 player/laptop/computer and work as wired speaker without Bluetooth function. The sound quality is the same.___________Specifications:Support A2DP， AVRCP， headset， handsfree profileBluetooth Version: V3.0Working Range: Up to 10mWorking Time: 5 hoursCharging Time: 2 hoursBattery Capacity: 520mAhFrequency Response: 280Hz-16KHzSignal-to-noise: ≥95GBDistortion: ≤0.5%___________Instructions:How to Use:1. Turn the switch to Bluetooth， a beep means the speaker is on.2. Open the Bluetooth of your mobile phone(for example)， search and find "BT Speaker”;3. Just match it and a human voice will remind you they have been connected4. Play music easily via the Bluetooth speaker___________Color: Mainly Silver and BlackNet Weight: 204g/7.16ozDimension: 60x60x55mm/0.20''x0.20''x0.18''___________Package Included:1 x Bluetooth Wireless Portable TF Mini Speaker1 x USB Cable with AUX Audio Line1 x User Manual(Do not include TF card)