1. Titanium-plated upper knife + all-steel fixed knife: sharp and wear-resistant, not easy to heat, suitable for long-term use. 2. New cooling cutter head: The small hole in the fixed knife reduces the temperature of the moving knife and the fixed knife. 3. All aluminum body: suitable for palm, easy to grasp. 4. Two-speed: 6000RPM precision trimming, 7000ROM body trimming. 5.3000mAh lithium battery: long life, 3 times longer than ordinary battery life.