The Calus GS2 is actually an air conduction earphone, not a true bone conduction headphone. While it uses an open-ear design similar to bone conduction tech to keep you aware of your surroundings, it transmits sound through the air into your ear canal rather than through your cheekbones.
Key Technical Specifications:
- Audio Technology: Air conduction with Hi-Fi quality sound
- Connectivity: Bluetooth version 5.3 with a 10-meter range
- Noise Reduction: Environmental Noise Cancellation (ENC) for clearer voice calls
- Battery Capacity: 70mAh
- Playtime: 4 to 5 hours at 80% volume
- Charging Time: 1.2 hours to full charge via a standby window of up to 45 hours
Pros and Cons of Air Conduction:
- Pros: High situational awareness for outdoor running or cycling; less jaw vibration fatigue compared to true bone conduction.
- Cons: Sound leakage is typically higher at high volumes; bass response is weaker than traditional in-ear silicone-tip earbuds






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