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Syllable G600 Wireless Stereo Bluetooth Earphone 4.0 HIFI 3.5mm HeadsetFor iPhone iPad Samsung Laptop PC Tablet Items Specification Speaker 40mm Impedance 16 OHM Bluetooth Version V4.0+EDR dual mode Audio frequency response 20-20000Hz Power level CLASS II Working voltage range 3.0V-4.2V Microphone Sensitivity -45+3db Output power 65mW THD+N=1% Bluetooth frequency range 2.402-2.480GHz Bluetooth distance More than 10M Audio transmission and remote control protocol A2DP/AVRCP Audio Input 3.5mm Battery Polymer Lithium battery Description:This fashionable, comfortable and durable Bluetooth 4.0 headphone is for both wireless and wired use,which allows y