Ultrasonic cleaner with ultrasonic wave energy for gentle clean that won't damage your valuablesProfessional cleaning tools, has a wide range of applications such as jewelry, contact lens, eyeglasses, etc.Portable and convenient design, can clean objects anytime and anywhere40 kHz ultrasonic frequency and high-power ultrasonic transducer for superior cleaning effectSize: 16.5 x 6 x 5 cmPackage Contents1 x Ultrasonic Cleaner1 x Contact Lens Cover Slot1 x Screw Driver""Material: PlasticColour: White, BluePower Supply: 2 x AAA batteries (not included)Product Size: 16.5 x 6 x 5 cmPackage Size: 17 x 7 x 8 cmHow to Use:1. Open the lid and fill plastic tank with water.2. Place the article into water.3. Close the lid and press the ON button.4. Wait for 3-5 minutes, then press the OFF button.