Patent Number: ZL201020644206.5 ZL201130009426.0 (Dual Electronic) query URL: Http: //www.gdzl.gov.cn basic functions: Dual treasure truck speed limiter - is a vehicle with mandatory speed limit intelligence speed products. When the vehicle speed speeding over the set time alarm horn speeding. Speeding driver also sustained over time buffer throttle controller starts, forcing the speed limit. Meet the national standard four, the card is more convenient