We loved the original and this one is a great way to drive your amp with 3 different flavors or use with FRFR cab with IR loaded.

The NUX METAL CORE DELUXE MKII is a high gain preamp pedal with 3 distinctive high gain amp models including the Duo Rect, Fireman, and VH 4. You can select these models via the 3-way toggle switch.
Features

Amp in a box.

• 3 high gain Amp Models in a compact enclosure.
• Duo Rect: Based on Mesa Boogie Dual Rectifier.
• Fireman: Based on Friedman BE-100.
• VH4: Based on Diezel VH4.
• IR out for amp-less application. (512 samples resolution)
• True-bypass.
• Parameters auto saving into 3 models.
• Low power consumption. (less than 120mA)
• TSAC-HD modeling offers realistic playability and response.

Specifications

• Input Impedance: 1MΩ
• Output Impedance: 1kΩ
• Dynamic Range: 104 dB
• DSP Processing: 48KHz / 32-bit
• A/D D/A Sampling Rate: 48KHz / 24-bit
• Power: 9V DC (Negative tip, Optional ACD-006A adapter)
• Current Draw: less than 120mA
• Dimensions: 122(L) X 72(W) X 47(H)mm
• Weight: 270g
  

The USB-C port is for firmware updates and connecting to the MetalCore editing software (see below). To update the pedal, connect a USB cable to your PC and hold the footswitch to boot-up the device and to enter the DFU (Device Firmware Update) mode. Once connected you can perform firmware updates using DFU updater software.