Main Features:● Adjustable headband, wear comfortable● An in-line omnidirectional microphone that picks up your voice without having to talk directly into it● 3.5mm plug compatible with all devices, for iPhone, smartphones, tablets, androids, ect● Portable folding design, easy to carry, music companion for travel essential● Headphone sensitivity: 106db● Microphone sensitivity: -52db±2dbNote: Due to the earphone is produced by different batches, the color of cable is black or the same as the color of headphone. Be aware of this before you buy it. Function: FM function,Microphone,MP3 player,Song Switching,Voice control Connectivity : Wired Connecting interface: 3.5mm Application: Computer,Mobile phone,Portable Media Player,Sport Plug Type: 3.5mm Cable Length (m): 1.2m Sound channel: Mono Frequency response: 20~20KHz Impedance: 32ohms Microphone frequency: 75-16KHz Package weight: 0.120 kg Package size (L x W x H): 12.00 x 5.00 x 16.50 cm / 4.72 x 1.97 x 6.50 inches Package Contents: 1 x Retractable Foldable Mic Headphone