audio-technica ATH-CK200BT Color: Gray Stored at home, with almost no use. Product Overview • Model Name: ATH-CK200BT • Type: Bluetooth Wireless Earphones (Neck Cable Type) Release Date: Around 2017 Connection Method: Bluetooth 4.1 Supported Codec: SBC Continuous Playback Time: Approximately 7 hours Charging Time: Approximately 2 hours Charging Port: Micro-USB Weight: 14g (Lightweight) Features Clear and well-balanced sound quality typical of Audio-Technica. Volume adjustment/playback/calls are possible with the remote control located on the cable. Built-in microphone supports hands-free calls.