■ Developed a new original feature "Magnetic Switch (PAT.P)" - turns on when the earphones are taken out and separated, and turns off when they are magnetically attached. ■ ※ "Magnetic Switch" is a registered trademark of Audio-Technica. ■ Long battery life with up to 25 hours of continuous playback. ■ Wireless charging Qi compatible, just place the charging case. ATHCKS50TW2BK ● "Magnetic Switch (PAT.P)" function allows use with just the earphones, leaving the case at home. Equipped with a function that turns on when the earphones are taken out and separated, and turns off when they are magnetically attached. This frees you from the stress of "worrying about the battery running out if you don't put them in the charging case" and "the hassle of taking them out of the case every time" that you might feel with previous true wireless earphones, allowing you to use them immediately when you want to. ● Long battery life with up to 25 hours of continuous playback※. With noise canceling OFF, the earphones alone can play continuously for up to 25 hours※, so you can enjoy music, videos, and SNS all day long without worrying about the battery running out. Also, with noise canceling ON, you can get up to 15 hours, and with the charging case, you can get up to 65 hours of continuous playback※. ※ When playing music. Varies depending on usage conditions. Body weight: Earphones: approx. 7.2g (L side), approx. 7.2g (R side) / Charging case: approx. 51.5g Wireless (separate left and right) Type: Canal type Noise canceling function: Supported Bluetooth supported profiles: A2DP, AVRCP, HFP Bluetooth Version: Standard Ver. 5.3 compliant Bluetooth supported codecs: AAC, SBC Charging terminal: USB Type-C Music playback time: Up to approx. 25 hours (earphones) with noise canceling OFF Number of case charges: 3 times Case charging time: Approx. 4.0 hours (when charging via USB) Earphone charging time: Approx. 2.5 hours Quick charge (mm minutes charge / mm minutes playback): 5 minutes charge / 90 minutes playback Sensitivity: -38dB (1V/Pa, at 1kHz) Playback frequency band: 5-20,000Hz Impedance: 20Ω Waterproof/dustproof: IP55 (earphone body only) Microphone: Supported Single-ear use: Supported Accessories: Charging USB cable (Type-A / Type-C), earpieces (XS, S, M, L)