Kubxlab Earshots - Portable Speakers - Red Works with any device that has a 3.5 mm jack Smart Phones, MP3 Players, Tablets, Laptops, Desktops, Portable Gaming/New generation of amplifiers that delivers maximum sound and clarity Lightweight, small in size, but incredible stereo sound/Aluminum Housing Up to 5 hrs playback after full charge Rechargeable Lithium Ion batteries Weight: 40 grams - Height: 37 mm - Diameter: 34mm