We created the Ink"d Mic"d ear buds with In-Line Mic, big sound, and small price so you can keep your money in the rank. And hold rank. The number 1 best selling bud in the USA. Features: In-line microphone + control switch; 11mm power drivers; 2 silicone gel sizes. Specs: Frequency response: 20-20 kHz; Cable type: TPE; Cable length: 1.3m; Plug type: 3.5mm gold plated In-line microphone function compatible with: iPhone, iPod models (except new shuffle) Most Blackberry (with stereo jack, no volume control)