The Vic Firth Bluetooth Isolation headphones are high-quality, closed headphones that reduce external noise levels by 20 decibels. The headphones offer excellent stereo sound, a clean low-end, defined mids and clear highs, with wide foam cushions for maximum comfort. Wired, they are perfect for live and studio use or for practising. The built-in rechargeable battery offers approx. 20 hours of use. The licensed Bluetooth headphones can be connected wirelessly to the devices provided for this purpose and offer you optimum mobility and freedom of movement, e.g. in your free time or while playing with playalongs. Also included are a 3.5 mm jack cable and a 6.3 mm jack adapter for optional wired use, as well as a US.