... ,Leather earflap, comfortable wearing, excellent noise reduction , Stretching type headbandSPECIFICATION 1.Adopt international general 2.4 G frequency, 48 ... use about eight to ten hours7.Support various mainstream player’s relevant control, realize the volume +, volume-,Pause/Play control8 ... 5Frequency Range20~2,0000Hz1.6Rated Power20 mW.(0.8V.R.M.S)1.7WeightApprox. 239 gram.1.8Capacity value350mah±10%1 ...