Come and Check Our Branding Solutions.This product has high sensitivity chip and precision chemical sensor, which can accurately measure the alcohol content in blood. The product is very novel. Sliding precision measurement can avoid the breeding of bacteria in the pipe blowing type, and there is no contact during the pipe blowing process. Accurate numerical value, LED high contrast screen display. They are small and easy to carry. It also has CE FCC certificate, which is safe and reliable. Pls check inventory and detailed info before placing your orders.