Ningbo TRF IOT Technology Co., Ltd. is a manufacturer specialized in recovery device, especially the automatic control system (PCB for recovery device motor and other electric family utilities). Ningbo responze Imp.&Exp. Co., Ltd. is our exporting company and Ningbo TRF Electronic Technology Co., Ltd. is our manufacturing factory.Welcome you to contact and visit us for any special design control board or control system, or any new design recovery device.