B07MR6WMK7 Pedaltrain Tuner (PT-SST)

Fast and accurate tuning (+/- 1 cent)
High brightness LED display for playing outdoors
Always-on, always-ready design
Innovative form factor with input, output, and 9V power connections managed via flexible dongle
Audio and power connections are routed under the Pedaltrain, out of the way
Optimally designed for use via dedicated tuner-out from volume pedal
Maximize space by tucking between pedals, even under neighboring 1/4″ Pedal jacks