AirPods are wireless Bluetooth earbuds created by Apple. They were first released on September 7, 2016, with a 2nd generation released in March 2019. They are Apple's entry-level wireless headphones, sold alongside the AirPods Pro and AirPods Max. Within two years, they became Apple's most popular accessory, notable for their critical success and viral sensationalism.In addition to playing audio, the AirPods contain a microphone that filters out background noise as well as built-in accelerometers and optical sensors capable of detecting taps (e.g. double-tap to pause audio) and placement within the ear, which enables automatic pausing of audio when they are taken out.On March 20, 2019, Apple released the 2nd generation AirPods, which feature the H1 chip, longer talk time, and hands-free "Hey Siri" support. An optional wireless charging case which costs extra was added in the offerings.