MARROW 305B 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 to your ears. The artificial protein leather of earmuffs simulated to human skin texture￡? giving you long-time comfort. MARROW 305B over-ear styling headset is stable￡? lightweight and comfortable.<br><br><strong>Features:</strong><br>Bluetooth V4.0￡? high performance￡? better and smoother transmission￡? 10 meters of communication distance.<br>Easy to pair with almost any Bluetooth-enabled audio / music players devices￡? such as￡? for Android / iOS Smart Phones￡? Tablet PC￡? Laptop￡? Notebook￡? etc.<br>40mm large dynamic alloy speaker drivers brings excellent deep bass !#!amp!*! stereo sound effect￡? ensures you to enjoy high quality music.<br>With high-performance microphone￡? it supports hands-free function￡? conveniently answer the incoming call and sets your hands free.<br>Built-in large capacity rechargeable lithium battery￡? music play time up to 20 hours￡? talking time up to 30 hours￡? 135 hours super long standby time.<br>Noise Cancellation: Acoustic echo cancellation and noise reduction effectively reduce ambient noise￡? immerse yourself into music world.<br>Ergonomic design￡? adjustable headband length￡? 90?? rotated ear cups￡? comfortable to wear and easy for storage.<br><br><strong>Specifications:</strong><br>Brand Name: MARROW<br>Model Number: 305B<br>Bluetooth Version: Bluetooth 4.0<br>Operating Range: up to 10 meters (straight line distance)<br>Bluetooth Protocol: HFP￡? HSP￡? A2DP￡? AVRCP<br>Speaker Diameter (Driver Unit): ?ù40mm<br>Speaker Impedance: 32ohm<br>Speaker Frequency Range: 20~20KHz<br>Microphone Dimension: ?ù6 * 5mm<br>MIC Sensitivity: -58dB??2dB<br>MIC Impedance: ??2.2K?<br>Operating voltage: 3V~4.5V<br>Battery: Rechargeable 3.7V / 450mAh lithium battery<br>Charge Port: Micro USB<br>Music Play Time: About 20 hours<br>Talking Time: About 30 hours<br>Standby Time: About 135 hours<br>Charging Time: About 4~5 Hours<br>Color: White<br>Main item size: 18.4 * 15.6 * 7.7cm / 7.24 * 6.14 * 3.03in<br>Item weight: 264g / 9.32oz<br>Package size: 24.6 * 23.0 * 7.7cm / 9.69 * 9.06 * 3.03in<br>Package weight: 664g / 23.42oz<br><br><strong>Package List:</strong><br>1 * Wireless Bluetooth Headset<br>1 * USB Charging Cable<br>1 * English User Manual