Wireless Rechargeable Stereo Earbuds with Bluetooth Driver: 10mm, Frequency response: 20Hz-20kHz, Impedance: 32 Ohms, Sensitivity: 120db Plug type: 3.5mm, Battery: Lithium-ion, USB cable included Operate your device with control buttons. In-line microphone. Switch between tunes and talk on the go. Removable Ear Hooks provide ultra comfort. Small, Medium, LargeEar Pads included for the perfect custom fit.