HHT-2 (Handheld terminal) is a HART communicator for HART devices. Based on mobile telephone or PDA and equipped with a HART software and a HART modem. Now HHT-2 can communicate with over 100 HART devices.It is smaller, multi-functional and easier in using.If any question,you can contact via email:xjf@sipai.com.We can provide you with more information of HHT-2.