Only at Best Buy Enjoy quality audio with these Jam Transit HX-HP420BL over-the-ear headphones, which feature powerful 33mm precision drivers for full, clear sound. The wireless design with a built-in battery offers up to 11 hours of music playback on a full charge. -Rechargeable lithium-ion batteryOffers up to 11 hours of wireless play time on a full charge. -Over-the-ear designAlong with an adjustable headband fits securely for long-lasting comfort. -33mm driversDeliver powerful, immersive sound. -Bluetooth technologyAllows easy wireless pairing with your compatible device. -Detachable cordPlugs into your device, so you can listen to music without using the battery. -Lightweight, foldable formEnables you to enjoy your favorite tunes on the go. Key specs-Headphone Fit : Over-the-Ear-Wireless : Yes-Built-In Bluetooth : Yes-Built-In Microphone : Yes-Water Resistant : No Warranty-Parts : 1 year-Labor : 1 year Design-Behind The Neck : No-Adjustable Headband : Yes-Foldable Design : Yes Feature-Phone Control : Yes-Carrying Case : No-Sound Isolating : No Power-Rechargeable Battery : Yes-Battery Type : Lithium-ion-Batteries Included : Yes-Auto On/Off : Yes Audio-Driver Type : Dynamic-Driver Size : 33 millimeters-Circumaural Or Supra-Aural : Supra-aural General-Color Category : Blue Dimension-Height : 7.87 inches-Width : 6.38 inches-Depth : 2.68 inches-Weight : 1.03 pounds Other-UPC : 031262068347