Wireless business headset featuring 12 hours of playback time and a lightweight design. Model Name: YYK-520 Wireless Version: 5.3+EDR Impedance: 16Ω Frequency Band: 2.4GHz Battery Capacity: 60mAh Playback Time: 12 hours Charging Time: Approximately 1.5 hours Standby Time: 150 hours Weight: 12g Operating Temperature: -10℃ to 40℃ Purchased online and used a few times, then stored. Selling to someone who wants it for organizational purposes. Operation confirmed. The box has foreign language descriptions. Please purchase only if you understand that this is a home-stored item. Please understand that we cannot negotiate the price. #WirelessEarphones #Earphones #WirelessHeadset #Wireless #Smartphone #Music