Features: brand new and high quality [Durable Headphone] Up to 400 mah battery capacity with only 4 hours fast charge, allows 10 hours continuous song playing, 12 hours phone answering and 240 hours standby for time. And the for protection board provides overcharge for protection and short circuit for protection, ensure the safety of batteries to keep the battery life last longer. [Ergonomic design and Noise Cancelling] Ergonomic design is the for protection of auricle from compression.It provide passive noise reduction, largely ensures your using experience. [Foldable And 360 Degree Surround Sound Effect] Foldable designed allows headphone to be carried easily. for High fidelity without distortion, it restores the real sound quality and music transparent. [Multi-founctional headphone]Bluetooth-compatible V5.0+TF card playing+FM radio+wireless playing [Outstanding Sound Quality]The enclosed design provides impressive sound quality, and the high-fidelity stereo provides incredible sound and music clarity. Improve the quality of calls and the fun of music listening experience. Specifications: Bluetooth-compatible Version: V5.0+EDR Frequency: 2.40GHz-2.48GHz Item Size: approx 16x16cm/6.3x6.3in Color: Black/Green/Pink/Red (Optional) Weight:220g Speaker Size:about 40mm/ 1.57in Effective Range:10M Sensitivity: -84dBm / 0.1% BER Frequency Range: 20-20KHz Voltage: 3.7VDC (built-in 400MAH rechargeable battery) Support: TF Card insert Package Includes: 1 x Headset 1 x User Manual note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.