Features: 1. Three Connection Methods: Pluggable 3.5mm headphone audio cable, Bluetooth connection, TF card pluggable, three connection methods to meet your different application needs, support radio. 2. Bluetooth 5.0: Compatible with multiple protocols for stable transmission, high fidelity level HIFI sound quality. The retractable and foldable design adapts to the head shape, and it is folded for easy going out. 3. Better Sound: 40mm dynamic drivers provide quality stereo with extra bass, mellow vocal, and surprising treble. 4. Skin-friendly Material: The skin-friendly protein leather earmuffs are smooth and delicate to the touch, and the inside is wrapped with a breathable sponge, which is soft and fully wraps the ears, is airtight, and does not leak sound. 5. Wide Compatibility: All devices with Bluetooth are available, and compatible with mainstream devices on the market tablet, computers, mobile phones, etc. Specification: Material: ABS Product Color: Black, Red, White, Blue, Green Product Size: 18 x 19 x 7.5cm Product Weight: 228g Bluetooth Version: Bluetooth 5.0 + ERD Receiving Distance: Barrier-free 15m Speaker Size: 40mm Frequency Response: 20Hz-20KHz Impedance: 30 Battery Capacity: 400mAh Charging Time: 2-3 hours Battery Life: 10 hours Standby Time: 300 hours Package Included: 1 x Bluetooth Headphones 1 x Manual 1 x Charging Cable