Audio-Technica ATH-CKS50TW, True Wireless In-Ear Headphones, With Active Noise Cancelling, Frequency range: 5 - 20,000 Hz, Impedance: 20 Ohm, Sound pressure level: 110 db/mW, Battery life up to 20 hours (headphones) or up to 50 hours (with charging box), Integrated microphone (characteristic: omnidirectional, frequency range: 100 - 8,000 Hz), Bluetooth 5.2 (aptX Adaptive Audio, aptX Audio, AAC, SBC), Low-latency mode, Multipairing function, Certified for Sony 360 Reality Audio, Audio Technica Connect App available for Android and iOS, Charging time headphones: approx. 3 hours, Charging time charging box: approx. 3 hours, Quick charge function (10 minutes charging allows approx. 90 minutes battery life), Protection class headphones: IPX4, Weight per earpiece: 8 g, Weight of charging box: 60 g, Colour: Black, Includes USB charging cable (30 cm, USB type A to USB type C) and ear tips (XS, S, M, L)