Bluetooth-equipped version of Austrian Audio's studio headphones, giving you the versatility to use them for casual listening as well as more serious studio use. Folding design, quality sound. Supplier's Notes: The Hi-X25BT closed-back Bluetooth headphones are a pro-level hybrid. You decide how you want to connect via analogue or digital, wired or wirelessly. Enjoy the precision and clarity of award-winning High Excursion technology wherever you are. Hybrid convenience at the professional level designed and engineered by Austria. Hi-X25BT headphones set the standard in connectivity. They offer a classic analogue connection via jack, a digital connection via USB-C, and absolute freedom wirelessly via Bluetooth. Wireless playback even continues when it's charging via USB-C, and of course, analogue listening is always possible. Imagine recording a song in a professional studio, listening to your favourite music on the way home in the underground, calling your band mates while you're at it, and then finishing your song mix at home without ever changing headphones - brilliant. No matter where you are or how you like to work, your Hi-X25BT headphones, with the award-winning Hi-X drivers, will be there for you. Thanks to the built-in high-efficiency battery, even up to 30 hours wirelessly via Bluetooth. The microphone and the touch-sensitive control element for start, stop, forward, back, louder, quieter and answering a call are all smartly integrated into the design. The replaceable ear pads are made of soft memory foam and fit perfectly to your head's shape without pinching. The Hi-X25BT is foldable and extremely robust, as the entire basic construction of the headband, including the hinges, is made of metal. Professional mobility designed in Austria. Specifications Frequency range: 12 Hz - 24 kHZ Sensitivity: 113 dBsl/V Impedance: 25 O Input Power: 150 mW Play Time: 30 h Bluetoothr Version: 5.0 Controls: Touch Control Jack cable: 1.4 m, 3.5 mm (1/8") USB Cable: 1.2 m USB-Cr Connector: 3.5 mm (1/8") Adapters (included): USB-Cr to USB-A, 3.5 to 6.3 mm (1/8" to 1/4") Battery Type: Built-in Lithium Polymer Dimensions: 205 x 170 x 80 mm Weight (without cable): 270 g