2BOOM Professional Sound Wired Earbuds with Microphone and Volume Control Red 2BOOM(TM) EP500MVR EP500M Professional Sound Earphones (Red) Specifications: ? Flat wire? Tangle-free? Microphone with volume control? Ergonomic design for max comfort? Speaker size: 12mm ? Freq resp: 20Hz--20kHz ? Sensitivity: 99dB (+/-3dB) ? Imp: 36ohm ? Cable length: 51"? Red UPC : 700729526521 Shipping Dimensions : 8.50in X 3.80in X 1.40in Estimated Shipping Weight : 0.25