BOSS TU-12 Chromatic Tuner (Excellent Condition) Precise tuning adjustments are possible with the tuning guide. ★ Operation confirmed with both AC adapter and 9V battery ★ - Model: BOSS TU-12 - Type: Chromatic Tuner - Display: Meter - Accuracy: ±1 cent - Reference Pitch: 440～445Hz (1Hz step) - Input/Output Terminals: INPUT, OUTPUT - Power: DC9V battery ※ Batteries and AC adapter are not included. Please prepare them separately. - Size: 145(W) x 35(H) x 53(D) mm - Weight: 170g - Instruction Manual included ※ For acoustic guitars, tune with a "microphone". Thank you for viewing. ※ Cleaned and disinfected with alcohol. ※ Please refrain from purchasing if you are sensitive to used items. ※ Basically, returns are not accepted. Thank you for your understanding. ※ Please understand that there is no warranty after purchase. Thank you.