See the BT-1 here: https://www.sweetwater.com/store/detail/BT1
Steve Fisher from Roland demonstrates the BT-1 trigger pad at Winter NAMM 2013. The BT-1’s compact curved form factor gives you the flexibility to position it ergonomically and saves space in your setup. With its compactness and affordability, the BT-1 is a great addition to any drum kit.
Roland BT-1 Bar Trigger Pad Features:
• Accurate and reliable triggering of percussion sounds
• Operate start/stop, effect on/off, and kit change on V-Drums
• Attach multiple BT-1s to your acoustic drum kit without ruining its appearance
• Compact curved shape provides flexible and comfortable positioning and saves space