Speakers - Universal - Mini Wireless Bluetooth Speaker Portable Stereo Subwoofer Bluetooth 4.2 Speaker with SD FM Outdoor Speakers | Portable Speakers (Black) Highlights Universal Mini Wireless Bluetooth Speaker Stereo Portable Speaker Bluetooth 4.2 Subwoofer with SD FM Outdoor Speakers | Portable Speakers (Black) Wireless Bluetooth Mini Portable STEREO Speaker PORTABLE SUBWOOFER Bluetooth 4.2 with SD FM Outdoor Column Speaker | Portable Speakers (Black) Features: Main Features: Bluetooth.Call.TF Card.AUX.USB.FM (In FM mode, put in micro charging cable to get better FM radio station.) Product material: ABS Bluetooth specification: Bluetooth4.2 Transmission distance: 10 meters Speaker specification: 45mm, 4/3W Amplifier specification: 3W Battery specification: 400mAh Playing time: 2-3h Product size: 92 * 46 * 92mm black color