TC Electronic PolyTune Classic - Manual (Page 7)

7
1 - 1/4 inch mono jack input
2 - 1/4 inch mono jack output (true bypass)
3 - Tuner on/off (true bypass) + Drop D access
4 - Tuner display, - Chromatic + Polymode
5 - Note indicator
6 - Needle/Stream toggle
7 - Drop Tuning & Capo mode access
8 - Power in (9VDC)
9 - Power out to other pedals
10 - Service port