Folding Cordless Headphones in ABS (59% Rabs) with Active Noise Cancelling (Anc) Function. These Headphones Feature Bt 53 Transmission & a 400 Mah Battery, Giving You a Battery Life of Approximately 15 Hours. When Connected to Your Mobile Device or Computer, They Can be Controlled Via Convenient Controls on the Headphones. If Necessary, They Can Also be Used Via a 35 Mm Jack Cable. Usb-C Cable to Charge. Supplied in a Box & Pouch. Flap: 300 x 200 Mm; Certificates Available: Red, Rohs, Reach, Minimum Quantities Apply.