Stereo Bluetooth headset with back-hang style Foldable design provides maximum portability</br>Features Software & CVC echo/noise reduction for reducing noise Wirelessly enjoy stereo music from all A2DP-enabled devices, such mobile phones, PDA, PC etc. Switch automatically from remote controls on the headset allow you to play,</br>The latest version of A2DP1.2 and AVRCP1.0 profiles support Supports Bluetooth Headset and Hands-free Profile(HFP 1.5) RF Frequency Range: 2.402-2.480GHZ, 2.4G ISM band</br>Radio Performance: Receive Sensitivity of -90dBm, TX Power Max 4dBm</br>Frequency Response: 20 Hz - 20 KHz, Very high Signal to Noise Ratio (SNR):95 Db, Total</br></br>Product Description</br></br>SoundBot SB220 Bluetooth Headset Wireless Stereo Headphone for Music Streaming & Hands Free Calling w/ 20 hrs. Talk & Playtime, 16 days Standby Time, Built-in Mic A2DP, AVRCP, Noise Reduction, Human Engineering Behind the Neck Frame Specification Bluetooth Specification v2.1+EDR class 2 The latest version of A2DP1.2 and AVRCP1.0 profiles support Supports Bluetooth Headset and Hands-free Profile(HFP 1.5) RF Frequency Range: 2.402-2.480GHZ, 2.4G ISM band Radio Performance: Receive Sensitivity of -90dBm, TX Power Max 4dBm Frequency Response: 20 Hz - 20 KHz, Very high Signal to Noise Ratio (SNR):95 Db, Total Harmonic Distortion (THD):0.1% 5 Button design: MFB, VOL+, VOL-, FWD, REV LED Indicator Status: Blue, Red Rechargeable 400mAh Li-Polymer Battery Mini 5 Pin USB Plug charging Port Charger adapter Output: DC 5V&200mA Nominal charging time: Max 4 hours Talk time: Up to 20 hours Standby time: Up to 400 hours Dimensions (main body): 54(diameter) x 23(H)mm Weight: 71.2 grams Note: No additional drivers required for Mac and Windows computers, please perform the following to get the latest drivers on the computer: 1. Run Windows or Mac OS update to get the latest driver 2. Install the latest driver if you are using a 3rd party Bluetooth receiver 3. Check the Bluetooth settings and configurations 4. Adjust the input and output sound sources</br><br/>http://www.amazon.com/gp/product/B00CBNG10C