1Adopting ultrasonic high frequency vibration technology, it cause no harm to human body 2Built-in 1800mah lithium battery, charge once for using 20 times. 58khz frequency special designed for cleaning contact lens, the effect is better. 32 minutes cleaning, can thoroughly clean the contact lens surface deposition of protein, minerals, calcium 4You don't need special care solution (functional water), directly using normal saline, pure water(distilled water) is fine 5Compact and portable, easy to carry for travelFeatures: 1. Adopting ultrasonic high frequency vibration technology, it cause no harm to humanbody. 2. Built-in 1800mah lithium battery, charge once for using 20 times. 58khz frequency special designed for cleaning contact lens, the effect is better. 3. 2 minutes cleaning, can thoroughly clean the contact lens surface deposition ofprotein, minerals, calcium. 4. You don't need special care solution (functional water), directly using normal saline,pure water(distilled water) is fine. 5. Compact and portable, easy to carry for travel. Specification: Condition:100% Model: CE-3500 Ultrasonic frequency: 58khz Inner liner material: all stainless steel 316 Capacity: 2ML(single tank) Ultrasonic power: 5w maximum Normal cleaning time: 2 minutes automatic stop Intensive cleaning time: 5 minutes automatic stop Color: White, Pink, Rose Red(optional) Liner Size: approx.50*25*10mm/2*1*0.4inProduct Size: Approx.9.8x8.6x4.5cm /3.9x3.4x1.8in