ANC33iS Active Noise Cancelling In-Ear Headphones reduce distracting background noise by up to 90% while offering superior sound. QuietPoint circuitry creates an acoustic wave that is 180 degrees out of phase with the ambient sounds around you, effectively cancelling out noise and leaving you with the music you want to hear. Quietpoint technology cancels up to 90% of background noise. Ultra-compact in-ear design that is ideal for travel. Silicone ear pieces. 1.3m cord length. Y-Type cord. In-line with microphone for calls and track control controls. 90% noise cancellation. 3.5mm jack . 13mm driver. Carry case. Compatible with universal smartphones. Batteries required 1 x AAA battery (included) . 60 hour battery life. In the box: aaa battery, pouch, comply; earphone tips and s/m/l eartips. Model number: ATH-ANC33S. Manufacturers 2 year guarantee.