MARROW 303B wireless Bluetooth headphone brings you perfect music enjoyment. With the high-quality microphone， the headset supports hands-free calls.Its special speakers transmit powerful bass and perfect sound. The protein leather and elastomeric sponge ear cushion simulated to human skin texture， giving you long-timecomfort. Its lightweight and comfortable is perfectly suitable for listening music， mountain-climbing， traveling， hiking and other sports.<br /><br />MARROW 303B Features:<br />Strong Compatibility: Compatible with almost all Bluetooth-enabled mobile devices such as， for iPhone 6s 6， for Samsung Galaxy S5 S4 S3 / Note 4 3 2， for HTC One， Tablet PC， Laptop， etc.<br />Bluetooth 4.0: With imported CSR/RDA Bluetooth 4.0+EDR chip， you can enjoy music and pick up calls with best sound quality. Advanced A2DP transmission effect is better than common product. Transmission distance is 10 meters without obstacles.<br />Excellent Bass: With built-in amplifier device and 40MM large dynamic alloy speaker drivers， it brings you perfect sound quality.<br />Echo cancellation and noise reduction reduce outside noise， which gives you a clear and quiet music world.<br />Endurance Time: with 450 mAh Polymer Battery， it offers 135 hrs of standby time， 20 hrs of music playing time and 30 hrs of talking time.<br />Ergonomic Design: The lay-out of button is reasonable， neat and easy to operate.<br />It has the advantage of portable， foldable and flexible.<br />High ventilated and pressure defense headband gives you comfort for long-time wearing.<br />Protein leather and elastomeric sponge ear cushion relief your ear from clamping.<br />Adjustable headband length， adjust suitable length as you like.<br /><br />MARROW 303B Specification:<br />Brand Name: MARROW<br />Model Number: 303B<br />Bluetooth Version: Bluetooth 4.0<br />Bluetooth Protocol: HFP， HSP， A2DP， AVRCP<br />Operation Range: up to 10 meters (straight line distance)<br />Speaker Diameter(Drive Unite): ?40mm<br />Speaker Impedance: 32 ohm<br />Speaker Frequency Range: 20~20KHz<br />Microphone Dimension: ?6 * 5mm<br />MIC Sensitivity: -58dB+2dB<br />MIC Impedance: &lt; 2.2K?<br />Operating Voltage: 4.5 V<br />Battery: rechargeable 3.7 V / 450mAH lithium battery<br />Music Playing Time: about 20 hours<br />Talking Time: about 30 hours<br />Standby Time: about 135 hours<br />Charging Time: about 4-5 hours<br />Interface: USB Port<br />Color: Black<br />Item Size: Approx. 17 * 16 * 4.5cm / 6.69 * 6.30 * 1.77in<br />Item Weight: Approx. 181g / 6.38oz<br />Package Size: Approx. 23 * 21.5 * 6cm / 9.06 * 8.46 * 2.36in<br />Package Weight: Approx. 479g / 16.91oz<br /><br />MARROW 303B Package List:<br />1 * Bluetooth Headset<br />1 * USB Cable<br />1 * User Manual<br /><br /><br /><br><img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/V/4/V1884/V1884-1-3910-EmSV.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/V/4/V1884/V1884-1-3910-3x77.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/V/4/V1884/V1884-1-3910-rE6R.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/V/4/V1884/V1884-1-3910-3v7t.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/V/4/V1884/V1884-1-3910-A1db.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/V/4/V1884/V1884-1-3910-Sz37.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/V/4/V1884/V1884-1-3910-cEZG.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/V/4/V1884/V1884-1-3910-OdQR.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/V/4/V1884/V1884-1-3910-D17M.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/V/4/V1884/V1884-1-3910-NxuP.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/V/4/V1884/V1884-1-3910-sdLK.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/V/4/V1884/V1884-1-3910-uPqN.jpg" /><br>