Extreme Clarity via DSP - By applying the latest Action 4 DSP tech to process digital music at an unprecedented level, X21 speaker delivers supreme audio and makes each musical beats crystal clear. Pure Aluminum radiators & Fun to Play -Dual AL radiators pumps out stronger bass than rubber radiators. To see sand grains or splashes pumping with rhythm on radiator is really cool. Rugged & Ultra Portable - Cylinder-shaped speaker with rubber bumpers can fit in backpack or bicycle bottle holder, with an attachable cord, you can just hang it on anything anywhere. Versatile Portable Bluetooth Speaker You Need -FM radio, Micro SD card Mp3 Player, AUX jack, True Wireless Stereo Pairing,IPX6 water resistance, latest Bluetooth 4.2, hands-free call. Hard Travel Case Included For Extra Protection- Tailor-made EVA case with carabiner gives extra protection and portability for travel and outdoor sports. Timeless Gift Idea - This wireless speaker with Fm radio and Bluetooth is an ideal present for family and friends. Simple to use, yet stylish and practical, it's sure to fill their heart with joy. Technical Specification: Bluetooth version: 4.2 Output:15 W Input:DC 5 V/1 A Battery:3.7 V/2400 m Ah Aux In:3.5 mm Micro SD Card Support:max. 32 G Net Weight:0.93 lb Dimension: 7.2 x 2.8 x 2.8 inches Charging Time: 3-4 hours Playing Time:10 hrs at 60% volume FM Frequency: 87.5 MHz-108 MHz TWS Pairing Range:max. 20 ft Package Included: 1PC XENEO X21 Portable Speaker Hard Travel Case Micro USB Cable AUX Cable User Manual Portable Bluetooth & Wireless Speakers Electronics