The MT-40W has a Metronome, Chromatic Tuner AND Tone Generator great compact package.
The HUGE display gives you all the parameters that you can adjust using the large 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