The NS2000 Earphones for HTC will never let you down. Full of heavy beats and warmth at an affordable price. Sound Characteristics The dynamic speaker is designed for everyday listening. The earphones deliver a warm and rich sound throughout the entire sonic spectrum, backed by heavy bass. Materials & Design Every part, from the aluminum housing and noise isolating silicone sleeves to the Kevlar reinforced cables have been carefully designed to offer great durability. Remote & Mic The remote and mic is fully compatible with HTC Android products. The remote and mic is fully compatible with answer/end calls and pause/resume playback on HTC Windows Phone 7 products. Audio is compatible with all HTC products. Requires a 3.5 mm stereo jack. Speaker: 8.0 mm dynamic Sensitivity: 105 dB SPL @ 1 kHz Remote and Mic Impedance: 16 Ohm @ 1 kHz Extra Sleeves (S, M, L)Frequency: 20 Hz - 20 kHz Housing: Aluminum Cord length: 730/320 mm Cords: Kevlar, Copper, TPESleeves: Silicone1 year replacement warranty.