Review and demo of the Mugig MT-1S Tuner/Metronome
The Mugig MT-1S is a combined metronome and tuner. I bought it on offer (for £5.99), but I think it's worth paying anything below £10 for this little device.
You can buy it here:
Amazon (UK): http://amzn.to/2wQkjEK
Amazon (USA): http://amzn.to/2wBsYM5