The DS1104Z-S Plus is a 100 MHz Digital Oscilloscope with 4 channels and 25 MHz 2 channel integrated source plus 12 Mpt memory and connectivity and 1 GSa/sec sampling. Also includes port for logic analyzer for the MSO Upgrade Kit. Future purchase of the MSO Upgrade Kit turns this into a MSO1104Z-S.The DS1000Z Series is the new economic level Digital Oscilloscope from Rigol to meet the customer's applications with its innovative technology, industry leading specifications, powerful trigger functions and broad analysis capabilities. The DS1000Z 4 channel oscilloscopes come in 50, 70 or 100 MHz versions with a 7 inch display and Rigol's UltraVision technology as well as a host of options. Add the optional analysis, decoding, deep memory, and integrated 2 channel waveform generator for a powerful 4 channel scope at an exceptional price. The Plus modes (available at 70 or 100 MHz) come with the MSO Logic Analyzer port built in. Simply purchase the MSO Upgrade Package accessory at a later date to turn a DS1000Z Plus into a fully equipped equivalent bandwidth MSO1000Z.