The JBL Flip portable speaker streams stereo music wirelessly from any Bluetooth-equipped device. This arrangement makes JBL sound available for a wide range of portable devices, including tablets. Some portable speakers struggle to produce bass, but not JBL portable speakers. The JBL Flip has a built-in bass port and generates bass that’s superior to comparable portable products. JBL speakers – even small ones – aren’t misers when it comes to delivering great sound. The JBL Flip employs digital signal processing to generate room-filling audio with great bass from a compact speaker. Not all of the sounds from the JBL Flip come from your music. There’s a microphone and a call-answer button so you can answer phone calls from the speaker. The JBL Flip stereo speaker has a built-in Li-ion rechargeable battery that provides up to five hours of playback time. You can easily recharge the battery using the adapter, which saves you battery hassles and money. The JBL Flip stereo speaker plays from either a vertical or horizontal position, so you can place it in a variety of locations. And it fits easily into a backpack, so you can take it from one place to the next. A clearly visible LED lets you know when the built-in battery needs to be recharged, as well as when the JBL Flip is in Bluetooth listening or pairing mode. Full specs Audio Features/Specifications Amplifier Power 2 x 5 watts Frequency Response 150Hz – 20kHz Signal-to-Noise Ratio 80 dB General Features/Specifications Power Listening time on battery power 5 hours Dimensions: Subwoofer (H x W x D – Metric/English 2-7/16″ x 6-5/16″ (63mm x 160mm) Black with silver elements