Advanced Foldable Bluetooth Headphones OldShark are struggling to introduce revolutionary new versatile headphones.. This Foldable Bluetooth Headphones can quickly and easily connect with smartphones, tablets and other Bluetooth devices within 33 feet\'s. The wireless mode make you never struggle again with the tangles and inconvenience of dangling wires from your headphones. In addition, this OldShark headphones were also upgraded with advanced High-Resolution sound with aptX codec, CSR4.1 technology. CVC 6.0 technology. You\'ll enjoy clear, transparent bass with midst and crisp highs sound. Dual-use Mode: Wired and Wireless Wired Mode: Come with a 3.5mm audio cable, you can use it as a wired headphone and enjoy favorite music when the battery runs low. Wireless Mode: Built in 230mAh battery, provides 10 hours\' continuous wireless playback music time in a single charge. Note: The Microphone only works in the wireless mode. Foldable and Portable Design The foldable design can be folded into small size, makes it convenient to carry when not in use or during travels. The stretchable design allows you to find the perfect fit for your head. Specification: Bluetooth Version: Bluetooth 4.1+EDR Profile Supported: AVRCP V1.4/HSP V1.2/HFP V1.6/A2DP RF Range :33 feet\'s without any obstacles Standby Time: About 230 hours Playback Time: About 10 hours Charging Time: 2~3 hours Package Include: 1 x OldShark Bluetooth Headphones 1 x USB Charging Cable 1 x Audio Cable 1 x User Manual