... up to ten years.2. With imported high-power device driver, the output power of the strong.3. It is the ... Years of continuous improvement, thoroughly tempered, quality, rock-solidAdvantages1:low power consumption, firm welding, low noise, small-sized, dust-proof, ... The manufacturer will do endless modification, please contact us for updated Ultrasonic Spot Welder,Hand-Hold Spot Welding Equipment