Product Features:1.HI-FI 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.2.Mutli-Functions: With TF Card slot, a small TF card is enough for enjoy music anytime and anywhere; 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.3.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 heasphone 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.4.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.Product Specifications:Version: V5.0Frequency: 2.40GHz-2.48GHzPower: Less more 4 dBm, class 2Effective range: 10MSensitivity: -84dBm / 0.1% BERFrequency response: 20 Hz - 20 KHzS/N rate: 70 dBDistortion: 0.10%Speaker size: 40mmSupport: A2DP 1.2, AVRCP 1.0, HSP, HSF 1.5Voltage: 7VDC (built-in 400MAH rechargeable battery)talking time: 15 hourstandby time: 250hourcharge time: 2-2.5 hourcurrent: 40 mAoperate temperature: -4 ~ +131F(-20 ~ +55C)Package Lists:1 x Headphones1 x USB Cable1 x User Manual