USB-connected light blue contact lens care product, equipped with a 320mAh lithium battery. Removes dirt adhering to the contact lenses through vibration. I used it a few times, but I've recently started using daily disposable contacts, so I'm selling it! - Color: Light blue - Power: USB connection - Rated voltage: 5V - Rated power consumption: 2W - Lithium battery: 320mAh - Materials: ABS, PP, electronic components Thank you for looking.