Features: Safety Information: It's not a wireless device. Confirm that the device is connected to the power source via adapter before turn on.Only long-term adherence to this product will have an effect. Not for Dark Brown Black Skin Tones and does not work for Red, Blonde, White/Gray hairs. Shave your hairs before using to avoid the flash from burning the surface hair and producing a burn smell and burn feeling. Please gradually increase the intensity from the lowest mode. If there is any discomfort, please stop increasing the intensity immediately.