Lenovo Go Wireless ANC with Charging stand (GXD1C99241) Lenovo Go Wireless ANC Headset with Charging stand Headphone Connectivity Technology: Bluetooth, Wired USB-C Cable, USB Receiver Headphone Type: On-Ear Microphone: Yes Wireless Range: 10 m Active Noise Cancellation: Yes Number Of Speakers: 2 Driver/Speaker Diameter: 40 mm Frequency: 20Hz - 20KHz Sensitivity: 107 +- 3 dB Impedance: 32 Call Controls: Yes Volume Control: Yes USB Q-ty: 1 Headphone Cable Length: 1.3 m Connectivity - Bluetooth: 5.0 Battery Description: 610 mAh Charging Time: 1.5 hours Music Playback Time: 35 hours Color: Thunder Black Dimensions: 22.7 x 8.7 x 25.5 cm Weight: Headset 230 g, Charging stand 356 g