Telenet manufactures Ultrasonic Cleaners/ Cleaning Device. Telenet offers various types electronic and ultrasonic pest control devices. The Ultrasonic Cleaners/ Cleaning Device use ultrasound [usually from 20-400 kHz] and an appropriate cleaning solution to clean delicate items. These Ultrasonic Cleaners are used for cleaning of jewellery, lenses and other optical parts, coins, watches, dental and surgical instruments, fountain pens, industrial parts and electronic equipment. Ultrasonic cleaning is fast and reliable, adaptable and economical, consistent and effective. This is because cleaning action is generated by high frequency sound waves that will go round corners, penetrate deep recesses or actually pass through barriers.