Chromatic tuner is Pedaltrain's unique take on the essential tuner pedal. SST's super compact design slides between pedals (in many cases under neighboring 6,3 mm jacks), saving space for more pedals on your Pedaltrain. Features 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 9 V 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 6,3 mm pedal jacks. Eight selectable tuning reference pitches A438 to A445. Durable aluminum chassis with acrylic display and ABS ends. No batteries, external power required.