Feature - Color: As shown. - Material: ABS. - Size: 1.5x1.5x2cm. - : 5.0 - Frequency response range: 20HZ-20KHZ. - Sensitivity: 120+5dB. - Impedance: 32. - Battery capacity: 3.7V/60mAh. - Power input: DC5V. - Charging time: 60min. - Rechargeable battery capacity: 3.7V/750mAh. - Support Agreement: HSP/HFP/A2DP/AVRCP. - 5.0 technology connection is more stable than 4.2 , not stuck, no delay. Power consumption is only half of 4.2. - Provide high performance sound with punchy bass, you can have a rich and dynamic stereo experience anywhere, anytime. - Completely no wiring design, mini and stylish, enjoy the music with freedom. - 750mAh charging box can charge your earphone conveniently, also convenient for carrying, protects your earphones from scratches.