Come and see our amazing products. Frequency range from 20Hz to 10K Hz, distortion rate 1%. These retractable earbuds come with a 3.5MM pin that fits almost all electronics, phones and MP3 players. Customized dome epoxy imprint can be made at the center movement. Black and white cable is available at length 32". Pls confirm with us about the packing info, stock status and exact production time before placing your orders.