Made in China
5 Hours Continuous Working Time: About 2 Hours Service Life: 8000H Power Supply Method: USB Charging Charging Voltage: DC5. [Safe Premium Material]: Electric Dental Cleaner is made of medical-grade alloy steel and food-grade ABS material as well as equipped with a high-fitting stainless steel cleaning head the start of the debridement scaler is intelligent it starts ultrasonic resonance scaling when it touches teeth and hard calculus and stops working when it touches soft gums safely protecting gums easy to use high strength anti-corrosion safer than other similar dental cleaning tools.87 inches (L) Weight: 0.Fierce Operating Frequency: 37KHZ+/-3KHZ,2 Million Times/Minute Rated Power: 0.