Remax Headphone RM-100H Comfortable wearing can bring you a perfect sense of listening and good pleasure enjoying the wonderful sound. High quality PU and ear muffs strengthen Aluminum trim, extendable metal slider and clamp. Specifications: - Multi-functional: In-line Mic - Volume Adjustment: Answer/End call - Play/Pause: Skip to previous or next song. - Driver Diameter: 40mm - Frequency Response: 20Hz--20kHz - Impedance: 32Ohms - Sensitivity(SPL): 105±3db - Rated Input Power: 50mW - Plug: 3.5mm - Cord Length: 1.2meters What's in the box 1 X Remax Candy Earphone RM-510 - Black 1 X Manual