Product Name: B-FREE Model Number: TWS-1226 Bluetooth Standard: Ver5.0 Codec: SBC Supported Profiles: A2DP, AVRCP, HFP, HID, AVCTP, AVDTP, SPP Case Battery Capacity: 300mAh Earphone Battery Capacity: 40mAh x 2 Communication Distance: 10m (varies depending on usage environment) Impedance: 16Ω Driver Unit: Φ10mm Frequency Response: 20Hz～20,000Hz Output Sound Pressure Level: 103±3dB Maximum Input: 10mW Earphone Weight: 4g x 2 Purchased at an electronics retailer. The item has been opened but never used. The condition is very clean and in unused/new condition, but please consider it as a pre-owned item before purchasing.