These Lexibook 2-in-1 audio headphones allow you to listen to music wirelessly via Bluetooth 5.0 with a range of up to 10 meters, or connected with the removable jack cable. The sound is limited to 85 dB to protect ears. It features a built-in microphone, along with play, pause, and volume buttons for easy music control and answering phone calls. Compatible with all smartphones, tablets, audio players, and video players that have Bluetooth or a 3.5mm audio jack output. The rechargeable battery provides several hours of life in wireless mode, with unlimited playtime in cable mode. Robust, lightweight, and foldable design makes it portable for school or travel. Adjustable to fit all head sizes for comfortable wear.