1. Tongda electrical machinery co., Ltd, passed ISO 9001 and ISO9002 with all its products CCEE , UL, CUL, CE, VDE, KEMA certified. Our fans also have been tested and approved by central inspection bureau of Fujian province, national electrical appliances supervising &inspection center national commodity electrical appliances supervising & inspection center. We have developed and manufactured the smallest, thinnest. Least power consumption and excellent performance fan to meet the market. 2. The specification is complete, from 40X40X10 to 92X92X25, voltage from 5VDC to 24VDC, if has the request, we are willing for you to design specially. 3. By sole coil design, in the thermostable insulation winds thread under the drive pipe protection with the second-level piece, to lead the magnet tube and the IC driving circuit composition perfect insulation motor up and down.Can depend on the market requirement to make it the low noise, the low energy consumption, to be smallest, to be thinnest, consumes the electricity most to save, the performance best air blower. 4. High performance-to-price ratio; Specialized design: If has the request, we are willing for you to design specially.