Lightweight and comfortable black bone conduction headphones HS1, with volume control buttons. Only the main unit and charging cord (different manufacturer) are included. Like new, only used for testing. - Type: Bone conduction headphones - Color: Black and gray two-tone - Connection: Wireless (Bluetooth 5.0) - Charging cord: Type-C (approx. 8 hours of use) - Weight: 29g - Fit: Comfortable - Waterproof: IP55 waterproof design - Instruction manual: Not included (please search online) - Original box: Not included - Features: Lightweight design - Buttons: Volume control buttons included Thank you for viewing.