Perhaps not the slickest promo video, but an interesting little box - made by Delptronics,  it's an all analog beat box with:

Features

• Eight Analog Drum Sounds
• Bass Drum
• Low Tom
• High Tom
• Snare Drum
• Wood Block
• Hand Clap
• Closed Hi-hat
• Open Hi-hat
• Eight voice polyphony
  
  
• All drums can be played simultaneously, including
  open and closed hi-hat for a super punchy cymbal
• Play Modes
  • Play Individual Drums
  • Play Patterns, including chaining up to 8 patterns
  • Play Songs with Pattern Fills
• Programmability
  • 32 User Patterns - plus 32 Built-in Patterns
  • 16 Songs of 24 patterns each
  • Configuration Options (MIDI channel, trigger modes, etc)
  • All data is retained without power
• Connectivity
  • Powered by built-in 9V battery, or standard pedal power supply
  • MIDI Input for playing individual drums, and MIDI clock and start/stop messages
  • DIN Sync Input for both clock and gate (start/stop)
  • Analog Clock Input
  • Analog Gate (start/stop) Input
  • Analog Trigger Output on selected steps and/or instruments

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• NAMM 2018: Delptronics MIDI Thru For Eurorack 01-Feb-18