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-time?comfort. Its lightweight and comfortable is perfectly suitable for listening music￡? mountain-climbing￡? traveling￡? hiking and other sports.?<br><br><strong>MARROW 303B Features:</strong><br><strong>Strong Compatibility:</strong> 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><strong>Bluetooth 4.0:</strong> 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><strong>Excellent Bass:</strong> 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><strong>Endurance Time:</strong> 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><strong>Ergonomic Design:</strong> 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><strong>MARROW 303B Specification:</strong><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><strong>MARROW 303B Package List:</strong><br>1 * Bluetooth Headset<br>1 * USB Cable<br>1 * User Manual