Feature: 1. PREMIUM SOUND QUALITY: Bluetooth headphone is equipped with a large 40mm speaker, the sensitivity is up to 121±3dB, with a wide range of frequencies from 20Hz to 20KHz, both treble and bass can be perfectly reproduced, bringing you an excellent sound quality experience. 2. SUPERIOR CONNECTIVITY: Over ear headphone adopts the latest bluetooth 5.3 technology, the connection is stable and lossless, the wireless distance reaches 10 meters, and supports A2DP, AVRCP, HSP, HFP protocols, which provides excellent experience no matter for traveling, gaming, sports or leisure. 3. POWERFUL BATTERY LIFE: This Bluetooth headset has built in 200mAh lithium ion battery, which supports long time listening or gaming, allowing you to immerse yourself in the world of music and games without worrying about the power. 4. MULTIFUNCTIONAL DESIGN: Our wireless headset supports 3.5mm sound interface, which is convenient for connecting all kinds of devices. In addition, it supports up to 32GB Memory Card, you can download your favorite music to Memory Card, plug and play, very convenient. 5. STRONG AND COMFORTABLE: The wireless headphone is made of premium ABS material with strong structure and durability. Over ear design, suitable for long time wearing without fatigue, ideal for sports and leisure. Foldable design, easy to store and carry. Specification: Item Type: BT Headphone Material: ABS Connection: BT 5.3 Wireless Distance: Approx. 10 Meters (32.8 Feet) Supported Protocols: A2DP, AVRCP, HSP, HFP Speaker Size: Diameter 40mm/1.6in Sensitivity: 121±3dB Impedance: 32Ω±15% Frequency: 20Hz-20KHz 3.5mm Sound: Support Storage: Supports Up to 32GB Memory Card (Not Included) Battery Type: Built in 200mAh Lithium Ion Battery Package List: 1 x BT Headphone1 x Data Cable 1 x User Manual