PRODUCT FEATURES: 1. Compatible with most devices that support headphone use. 2. LED power indicator shows power and charging status. 3. 360-degree sound field with a cone design and built-in speaker for omnidirectional audio output. 4. Equipped with a 1.4-inch subwoofer and vacuum base for enhanced bass and rich, high-fidelity sound. 5. Patented bass extension technology provides improved low-frequency performance. 6. Compact and portable mini speaker design fits comfortably in the palm of your hand. 7. Built-in lithium-ion battery charges via USB or power adapter. 8. Rechargeable battery provides up to 3 to 5 hours of playback on a single charge. Additional Speaker Details: Type: Speaker Amplifier Output: 2.4W Rated Power: 2.2W Dimensions: 50mm (W) x 50mm (L) x 35mm (H) / 1.97 in (W) x 1.97 in (L) x 1.38 in (H) (Approx.) Jack Size: 3.5mm Speaker: 36mm Micro Speaker, 4 Ohm Frequency Response: 200Hz - 20kHz Signal-to-Noise Ratio: >89dB Distortion: