The MT-40W has a Metronome, Chromatic Tuner AND Tone Generator all in one great compact package.
The HUGE display gives you all the parameters that you can adjust using the control buttons.
Plug in your electric instrument, a pickup for your acoustic, wind or brass instruments into the 1/4 in (6.3mm) input jack or use the built-in microphone.
WIth all these important features, the MT-40W is tough to beat!

Tuning range:A0(27.5Hz)~C8(4186Hz)
Tuning mode:Chromatic,
Tuning key:C, F, ,
Tuning precision:±1 Cent
A4 range:430~450Hz
Detection :Mic, Line-in
Display mode:LCD display, LED display
Tuning :Auto
Tone Generator
Reference tone range:2A~6A
Reference tone precision:±0.5 cent
Metronome
Tempo range:30~250 bpm
Beat:0~9
Rhythm:
Tempo precision:±0.3%
Metronome sound:Electronic sound
Power supply:3V(2xAAA)batteries (not included)
Colour:black
Material:ABS+Electronics
Size:105 x 18 x 65mm

Package Contents:
1 * Tuner
1 * Pickup