- Brand: ACEFAST
- Model: K3 Ultra
- Bluetooth Version: v5.4
- Maximum (Peak) Output Power: 120 W (1×66 W + 2×27 W)
- Rated (Continuous) Power: 1×33 W + 2×13.5 W
- Speaker Units: 3 (one mid-low driver and two high-frequency drivers)
- Passive Radiators: 2 passive diaphragms
- Battery Capacity: 4,500 mAh / 11.1 V
- Playback Time: Up to ~19 hours (at 50% volume)
- Charging Time: Approximately 6 hours
- Frequency Response: 60 Hz – 20 kHz
- Waterproof Rating: IPX6
- TWS Support: Yes — true wireless stereo interconnect
- EQ Modes: 3 modes (Music, Movie, Outdoor)
- Lighting Effects: RGB lighting (multiple modes)
- Connectivity Options: Bluetooth, AUX (3.5mm), USB-A (flash drive), TF card slot
- Dimensions: ~230 × 119.5 × 102.5 mm
- Weight: ~2.06 kg
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