This is the same piece for either the 905 or 980.
The Delta Base is the handle portion of the device. All terminal heads can attach to this base. The cord at the end of the base is a USB and can be plugged into any USB port, though it is designed for optimal use with the portable batteries sold in the Delta Sets.
This item only includes the Delta Base. To use, a terminal head is required.
Images kindly supplied by Radiant Life Technologies.