Bluedio R Bluetooth Headset Black We are very pleased to be appointed North American Distributors for this unique, bluetooth high end headset range. The world first 8 sound tracks Bluetooth headset, bring you astonishing HiFi music experience Bluedio R headset with 2 50mm built in 100Ω woofers, and 6 32Ω 3D drivers, bring you astonishing HiFi home theatre and music experience that you never have. After simple pairing, can achieve function such as wireless communication, listening to music, network communication and enjoying movie. Support LINE-IN: With 3.5mm jack, just plug in 3.5mm audio cable, can be connect with mobile or computer, listening to music. Without missed any incoming call: It will change to ringtone automatically when you are listening to music or enjoying movie under Bluetooth, Micro-SD card or LINE-IN mode. Support Micro-SD card music playing: Can play music of MP3 and WMA format through Micro-SD card(up to 32GB). Support USB files transfer: With built in Micro-SD card slot, after insert Micro-SD card, you can transfer file, movies or music data without switch on the headset. Trendy and elegant outlook: With elegant piano coating and mirror design over Bluedio R headset, leading headset design of 2012. Extremely portable flexible headband: With foldable headband, you can fold it into a smaller size, more convenient for carrying. Adjustable headband Maxim amplifier: Amplifying sound effect, and noise cancellation provide better quality of music and communication. With up to 20 hours talk time and up to 325 hours ultra long standby time. Electric specification Charged by Micro-USB 5-pin; 650mA Polymer rechargeable battery Operating distance: 10-20m 3D driver combination, with 2 built in 100Ω woofers and 32Ω 3D drivers Frequency response: 20-22kHz Music play time: up to 20 hours Standby time: up to 325 hours 12.Charging time: 3-4.5 hours 13.Headset net weight: 283g Accessories 3.5mm audio cable, USB charging cable, Portable holster, User"s guide