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Color:Black Features: Supports hands-free call and low-voltage alarm function. Automatically switches between music play and calling function. Easily control playing / pausing, adjusting the volume, previous / next songs, answering / rejecting / ending an incoming call and redialing the last number. Adjustable headband, lightweight, and has soft cushion earplugs, comfortable to wear. Built-in high-efficiency rechargeable lithium battery, and charged by the included Mini USB port. Note: For PS3 / PS4, you can use this headset to chat with your partner when playing games but can NOT hear game audio on these headphones. Please note the information before purchase. Specifications: Bluetooth Name: COOLNICE Bluetooth Version: V3.0 / Class B Wireless carrier frequency: 2.4GHz ISM Working Current & Voltage: 50mAh / 3.7V Headset Frequency Response: 40MHz-20kMHz Microphone Frequency Response: 100MHz-10kMHz Headset SNR: 85db Speaker Diameter: 40mm Microphone Dimension: 6.0mm Microphone Sensitivity: -42dB Lithium Battery Capacity: 350mAh Play time: 6 hours Charging time: 2 hours Receiving Range and Distance: 10m / 360Â¡Ã£ System Requirement: Windows XP, Windows vista, Window 7, etc. Material: ABS Product Color: Black, White (Optional) Main Item Size: 18.5 * 18.5 * 3.5cm / 7.28 * 7.28′ * 1.37in Main Item weight: 205g / 7.24oz Package Size: 22.5 * 22.0 * 8.0cm / 8.85 * 8.66 * 3.14in package weight: 337g / 13.30in Package List: 1 * Bluetooth Headset 1 * USB Cable 1 * English User Manual