- Brand: Audio-Technica - Model Name: ATH-CKR70 - Condition: Mint condition with all accessories. I use wireless earphones daily, so I've only used these a few times. There are no scratches or stains, but please understand that these are used items before purchasing. ● Equipped with a φ11.8mm driver that pursues the best balance of sound and fit. ● Lightweight and strong aluminum housing suppresses unwanted resonance and achieves high response. ATH-CKR70: Equipped with a high-efficiency φ11.8mm driver ● The newly designed driver, based on micron order*, achieves high-precision forward and backward linear motion of the diaphragm, enabling high-resolution playback up to high-resolution audio sources. ● The newly designed body fully drives the new driver, providing both comfortable fit and high sealing performance.