ACEFAST H4 ANC wireless headset.

Bluetooth version: v5.3. Transmission distance: 10m. Driver: 40mm, Hi-Fi level. Frequency response: 20Hz-20kHz. Impedance: 32Ω±15%. Battery capacity: 500mAh / 1.85Wh. Input: DC5V⎓0.5A (USB-C). Charging time: 3 hours. Working time: 80 hours (ANC off), 65 hours (ANC on). Size: 180*80*190mm. Weight: 233g. Feature 1: 30dB ANC noise cancelling. Feature 2: Over-the-ear earpads with protein leather and memory foam. Feature 3: 80 hours of continuous music playback (ANC off). Feature 4: Foldable and rotatable earcups. Feature 5: Adjustable headband. Feature 6: IPX4 water resistance.