Made in China
Fierce Operating Frequency: 37KHZ+/-3KHZ Rated Power: 0.8% or more compared to other products easier to separate plaque and calculus this calculus remover has no vibration and very low noise during use.4 inches (L) Weight: 0.5 Hours Continuous Working Time: About 2 Hours Service Life: 8000H Power Supply Method: Micro-USB Charging Charging Voltage: DC5.