t50gb chromatic tuner ( guitar & bass) twelve average move/automatic chromatic:a1 ( 55hz ) - a6 (1760hz ) guitar: 1e 2b 3g 4d 5a 6e bass: 1g 2d 3a 4e pitch shift: 436hz 438hz 440hz 442hz 444hz indicator: lcd dc power: dc 3v ( battery aaa*2 ) dimension: 103mm*67mm*19mm weight: 60g tuning error: less than 0.8cent