The Seiko SQM-318 Metronome is a professional quality, Japanese made musical accessory suitable for a range of instruments including piano, cello, guitar, violin, banjo, and viola. The dial enables you to set the tempo anywhere between Andante (40bpm) and Presto at 208bpm with a clear arrow indication. You can set it to flashing red led only or sound and flashing red led, you can also plug in 3.5mm jack headphones.
eBay