eBay

Earpiece design - Over-the-head
Earpiece type - Binaural
Minimum frequency response - 100 Hz
Maximum frequency response - 20 kHz
Connectivity technology - wired.Sensitivity: 98 dB

Take the Description from here http: //www. Combination/end/products/headphones/on-ear-headphones/ed1tc__ed1tc_insitutional_headphones.