The RTR-500 can be used as either a Base Unit or a Repeater for our newest RTR-500 Wireless datalogger Series. It can also be used to extend wireless communication between an RTR-500 datalogger and an RTR-500GSM Mobile Base Station. Easy-USB connection means this type of Base Unit is perfect for on-site use. By being able to send downloaded recorded data and/or current readings by e-mail or FTP to a designated address, the RTR-500 makes data management easier and more streamlined than ever before.