Active Noise Cancelling - clearer, full HD sound with 40mm speakers Bluetooth 4.0 with a range of up to 12 m - splash-proof (IPX4) Hands-free microphone - up to 12 hours run time (when anc is enabled) Cable for use when battery is empty Compatible with Amazon Alexa, Siri and Google Assistant Included components: Headphones - 3.5mm audio cable - Quick Start Guide