Eco Friendly  Biodegradable Wheat Straw Earphones  Head phones 

Speaker: 2 X 40 mm ,Impedance: 32Ω ,Sensitivity: 103±3 dB

Communication/playing time: 3 hours or more 

Headphone size:180* 180 * 80mm 

Material: wheat straw+metal+ABS

Standard: CE/ROHS