... .Bluetooth Version: V1.2/V2.0 2,Power:Class23,Wireless frequency: 2.402GHZ~2.480GHZ ISM Band 4,Range: ... ,Holding time:4-5 hours7,Product weight:32g/pc8.High quality wireless bluetooth headphone fashion Bluetooth stereo headset with mp3 Operation1. ... supply directly,cheap price quality assurance-we accept different payment method-Mix-color for your chose High quality stereo bluetooth neckband computer ...