These sound hole tuners are great, they fit to the inside edge of any acoustic sound hole and are very reliable and discreet to onlookers, whilst you tune your guitar before playing 👍
It would be so much nicer if these were made rechargeable with a C connect charge cable tho, altho I will say the flat battery that are used for these tuners, do last a long time. I would've said 5 stars if they were rechargeable so I've put 4 stars b'cos they run from a flat battery. I'm happy all the same, thanks D'Addario, brilliant, i have 3 now, one for each of my 4 acoustics. I'll get the 4th sound hole tuner soon lol 😆 👍💯✌️❤️🎶🎶🎶🎶🏴🇬🇧