... adjustable headband, support 2conections simultaneously Best Bluetooth Headphones BH-M9 has more than 220 hours ... ).USB Charging line.3).User guide. Best Bluetooth Headphones Verified Information This information is Verified by Bureau Veritas ... M9, SK-BH-M10B, SK-BH-M13, SK-BTH-008, SK-BTH-066, SK-BTH-069, SK-BTH-078 ... , SK-BTI-003, SK-BTI-005, SK-BTI-008 2010/05/15 TEST REPORT SGS Bluetooth Headset, SK ...