Features: 【HI-FI,CD Sound Quality】- The closed-back design of bluetooth headphones provides immersive Hi-Fi sound with BLUETOOTH V4.0 chip and 40mm driver together , which make exceptional sound reproduction and wide dynamic range to provide outstanding sound quality, rich and strong bass, crisp and clear highs. 【Multi-Functions】- With TF Card slot, a small TF card is enough for enjoy music any time and any where ; With FM Radio Function, Allowing You To Listen To Radio Anywhere, Anytime ( Note: FM Radio May Can't Work In Some Foreign Countries ) . 3.5mm audio jack, provides a simple wired connection of a variety of devices without Bluetooth. 【Comfortable And Foldable Design】- Comes with extremely soft Memory-protein ear muff ensuring lasting comfort when you using this wireless headset. Folding and lightweight design makes the wireless bluetooth headphone easy to be carried and stored.It is suitable for use on trips,vacation,or any other place,achieve enjoy music everywhere and any time. 【Smart Handsfree Talking】- Built-in Concealed High Definition Sensitive Microphone, The Headphone Itself Has A Answer Incoming Phone Calls' Button To Pick Up Phone Call, Wireless Handsfree Talking. 【Long Play Time】- Playing time up to10 hours, and continue talk time up to 8 hours, standby time up to 250 hours. 【Widely Use Range】- Compatible for almost all the mobile phone, tablet PC, notebook, almost any devices with bluetooth function. Specifications: Talking time: 15-25 hours Support system: A2DP 1.2, AVRCP 1.0, HSP, HSF 1.5 Standby time: 350hour Mode: stereo sound mode Charge time: 2-3 hour With Microphone: Yes Wireless Type: bluetooth Waterproof: No Volume Control: Yes Voltage: 3.7VDC (built-in 400MAH rechargeable battery) Total Harmonic Distortion: 0.38% Support Memory Card: Yes Style: Headphone Sensitivity: 85dB Resistance: 32Ω Plug Type: Line Type Other function: TF card playing(excluded TF card) Number Of Drivers: 2 Model Number: LPT660 Max Output: 1238mW Magnet Type: Neodymium Wireless: Yes Headphone Pads Material: Genuine Leather Frequency Response Range: 18 - 22000Hz Frequency: 2.40GHz-2.48GHz Features: Detachable Cable Effective range: as far as 15 meters Earcups Type: Semi-open Driver Diameter: 40mm Control Button: Yes Connectors: 3.5mm Communication: wireless Codecs: sbc Charging Method: CABLE Certification: CE,FCC,RoHS,UL Bluetooth version: V5.0+EDR Noise-Cancellation: No