Matrix Audio Qube Rechargeable Mini-Speaker for Universal 3.5mm Devices - Red (MQUBERDA) Pocket-sized 78-grams each Rich aluminum finishing Passive Vibrating Bass(PVB) Universal 3.5-millimeter headphone jack Carrying pouch included Pocket-sized (3 oz) Rich aluminum finishing Passive Vibrating Bass (PVB) Universal 3.5-millimeter headphone jack Carrying pouch included Internal rechargeable battery 3W output Up to 8 hours of playback