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Romly Mechanical Switch Data Book & 12-Switch Tester

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Original price $19.99 - Original price $29.99
Original price
$19.99 - $29.99
Current price $19.99
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Note: switch testers are not automatically bundled with books. They must be added to your cart separately.

Sometimes the mechanical keyboard world can seem overwhelming. It can also grow into a relaxing hobby that you want to share. Romly, a Japanese keyboard enthusiast, has a coffee table guide to help out.

detailed images and infographics

Beautiful photos and detailed research cover every page. Each element of the book is stylish, informative, and (oftentimes) cute. Learning and sharing will be easy, especially with the optional tester as a reference.

commentary and data for 12 switches

Romly breaks down different keyswitches based on raw data (like force curves), offering a lighthearted take on their performance and press-feel. Pop-culture references abound. Even the glossary of terms is accessible.

community spirit

Nods to community members, helpful organizations, and individuals show great respect for the keyboard hobby. Our team admires this — we hope to see more contributors like Romly creating content in the future.

switch tester bundle

  • Gateron: Red, Black, Blue, Brown, Clear, Green, Yellow
  • Kailh: Pro Burgundy, Pro Purple, Pro Light Green
  • NovelKeys x Kailh: Box Thick Click Jade, Box Thick Click Navy


  • Book Dimensions: 18.2 cm x 18.2 cm x 0.4 cm
  • Book Weight: 138 g
  • Tester Dimensions: 9.1 cm x 9.1 cm x 2.5 cm (base to keycap)
  • Tester Weight: 82 g