Bluetooth Connectivity and Strong Compatibility: The ultra-portable speaker can be connected to any device which has Bluetooth enabled. It is compatible with devices like , , Android phones, MP3 players and many more. It has strong connectivity for clear, uninterrupted audio. AUX and USB Port: The speaker has a USB Port for charging and an AUX port support audio input. Card Reader And FM Radio: The Micro-SD card reader is actually a music player, it can play Mp3/Wma music storage on your memory card. Rechargeable Battery: This speaker has a built-in rechargeable battery which can be using a USB cable. The playback time for this speaker is 2 to 4 hours once fully , depending on the level of volume you at. Surround Sound and Sound Quality: The speaker has a special combination of stereo sound and bass effect which is a distinct sound chamber structure which gives you impressive bass and perfect treble. It also comes with stereo like surround sound, so that you can watch in a theatre like setting. Product name: Waterproof Bluetooth Speaker Product size: 88x35mm Bluetooth version: 5.0 Speaker specification 50mm Rated power: 3W Transmission distance: 10 meters Battery capacity: 300 mAh Rated voltage: DC 5V Bluetooth call: Yes TF card function: Yes FM radio function: Yes Charging time: 3 Playing time: 4-5 Product material: ABS Product color: blue Product weight: 230 grams (plus packaging accessories weight) Package Contents: 1x waterproof Bluetooth speaker 1x data cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.