Features:
Provide high quality sound for both calling and music. 3.5mm standard plug: suitable for nearly all smart phones. Built-in microphone: with answer and hang up . Soft clear air tube design: advanced silicone earplugs. Can enormously reduce radiation when making the phone call. CTIA/OMTP mode switch, compatible with nearly all smartphone.
Specification:
Name: Mobile dual-spiral headphones Weight: about 22g
Size: approx. 2x1x1 cm / 0.8x0.4x0.4 inch
Material: Plastic, Metal
Cable length: approx. 1m / 3.3 ft
Plug: 3.5mm
Type: Stereo air tube radiation-proof earphone
Speaker Spec: 10mm
Sensitivity: 102db S.P.LAT 1KHZ
Speaker frequency response: 20Hz-20,000Hz
Impedance: 32Ω
Rated power: 100mW

Package List:
Headset * 1
Earplugs * 4
Instruction manual * 1