The Tartarus Pro 2019 by Razer is a 60% or Less sized keyboard with 32 keys, which uses Optical switches. The Tartarus Pro 2019 keyboard uses a USB connection. It is supported by Synapse software. And has Chroma RGB backlighting.
While most gaming keypads and keyboards register a singular input when pressing a key, the Razer Tartarus Pro is fitted with Razer Analog Optical Switches which can register scaling levels of input in the same motion depending on how far you press. This allows for a more measured and nuanced form of control.