audio-technica ATH-CK200BT Color: Blue I don't remember when I bought it, but I've been storing it at home for a while. Product Overview • Model Name: ATH-CK200BT • Type: Bluetooth Wireless Earphones (Neck Cable Type) 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 on the cable. Built-in microphone for hands-free calls. No box or instruction manual. Please understand that this is a used item before purchasing.