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| Specification | Value |
| Brand | Haylou |
| Model | S40 |
| Type | Wireless Over-Ear Active Noise-Cancelling Headphones |
| Driver Configuration | Dual Driver System (40 mm Titanium-Coated Woofer + 20 mm Tweeter) |
| Noise Cancellation | Up to -50dB Adaptive Hybrid Active Noise Cancellation (ANC) |
| Spatial Audio | 360° Spatial Audio with 6-Axis Head Tracking Sensor |
| Bluetooth Version | Bluetooth 6.0 |
| Bluetooth Protocols | A2DP v1.3.2, AVRCP v1.6.2, HFP v1.8 |
| Audio Codecs | LDAC (Hi-Res Audio Certified), SBC, AAC |
| Wireless Range | Up to 20 meters (barrier-free) |
| Latency | 80 ms (Pro Gaming Mode) |
| Microphone System | 5-Mic Array + Pro-Grade Detachable 360° Supercardioid Mic |
| Battery Capacity | 650 mAh |
| Playback Time (ANC Off) | Up to 90 hours |
| Playback Time (ANC On) | Up to 60 hours |
| Fast Charging | 10 minutes charge gives up to 5 hours playtime |
| Charging Time | Approx. 2.5 hours |
| Charging & Audio Port | Type-C (Supports charging and Type-C wired audio) |
| Connectivity Features | Dual-Device Multipoint Connection |
| Dimensions | 195.3 mm x 173.4 mm x 83.7 mm |
| Weight | 280 g |
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