Earpump Neo Features If you’re looking for flashier colors than the Earpump Twirl, and a similar audio experience, consider the Earpump Neo series. From Psychedelic to chrome, you’ll be spoiled for choice. Technical Specifications Speaker Dimension : 11mm Impedance : 32? Sensitivity : 105dB Frequency Response : 20Hz – 20kHz Cord length : 1.3m works with all mobile devices with 3.5mm jack Supreme audio quality from the Earpump legacy premium quality silicon gel included (4 sets) Built-in high sensitivity push-to-talk microphone Soft travel pouch included