Whether you're heading to the gym or the office, the ATH-CKR300BT Wireless In-Ear Headphones from Audio-Technica are designed to provide all-day playback of high-quality audio. The 9.8mm drivers are joined by a top-mounted PCB for maximum airflow during playback, and the built-in battery can play your favorite tunes continuously for up to 8 hours. The headphones are made to feel comfortable during that time with multiple pairs of eartips, and compact, lightweight earbuds. The IPX2 rating helps ensure they'll withstand your workout, with resistance to dripping water, such as from rain or sweat.
Voice confirmation (in English) for power on/off, Bluetooth connection/disconnection, and low battery
Support for the AAC codec
Four pairs of different-sized eartips to help ensure a secure fit
Fully recharges in approximately 2 hours