| Product name: | ACEFAST W2 ANC ENC earbuds. | 
| BT version / chip: | v5.4 / 7006D4. | 
| Audio decoding protocol: | SBC/AAC. | 
| Frequency response: | 20Hz~20kHz. | 
| Transmission distance: | ≥10m. | 
| Earbuds battery: | 35mAh. | 
| Headset working time: | About 8 hours (music mode, 60% volume), 5 hours (call mode, 60% volume). | 
| Charging case battery: | 400mAh. | 
| Total working time: | About 35 hours. | 
| Charging time: | Earbuds: about 1.5 hours.Charging case: about 2 hours.
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| Charging case input: | USB-C, DC5V / 1A. | 
| Size: | 51*29*56mm. | 
| Total weight: | About 40g. | 
| Waterproof rating: | IPX4. | 
| Certification: | CE, FCC ID, ROHS, EAC, UN38.3, MSDS, air and sea freight report. | 
| Feature 1: | 35dB ANC noise cancelling. | 
| Feature 2: | 4-mic ENC call noise cancelling. | 
| Feature 3: | Professional-grade tuned 13mm speakers. | 
| Feature 4: | LED digital display. Check the charge level of the earbuds and charging case at any time. | 
| Feature 5: | Stable wearing. |