ConnectionsInput jack (3.5 mm monaural mini-phone jack, unbalanced), headphones jack (3.5 mm stereo mini-phone jack)SpeakerDynamic speaker (23 mm)Power SupplyTwo AAA batteries (3 V, zinc-carbon or alkaline)Battery LifeWhen using the tuner only Approx. 250/150/85 hours (backlight: Off/Soft/Auto, A4 continuous input, using alkaline batteries)
When using the metronome only Approx. 200/130/75 hours (backlight: Off/Soft/Auto, tempo of 120, four beats, maximum volume, using alkaline batteries)Dimensions (W x D x H)107 x 72 x 18 mm / 4.21” x 2.83” x 0.71”Weight79 g / 2.79 oz (without batteries)Color VariationsBlack, WhiteIncluded ItemsQuick Start Guide, CM-400 contact microphone (TM-70C only)Accessories (separately sold)CM-400 contact mic