Check the listing for details. D'Addario Eclipse Rechargeable Cello/Bass Tuner. Condition: New. Listed at 24.99 USD. Clip-on Tuner for Bass and Cello Designed to adhere to the vibrations of lower-stringed instruments, Sweetwater Academy of Music & Technology instructors have found the D’Addario Eclipse rechargeable tuner to be a perfect tuning solution for cello and bass musicians. Its clip-on design and multi-swivel action make it easy to place and position for an accurate, easy-to-see intonation reading in any environment. Additionally, an onboard rechargeable battery provides up to 24 hours on a single charge, and features an auto power-off function to prevent idle power loss. Best of all, its low-profile construction is easy to throw into any case pocket, band bag, or even your pocket for convenient travel from the rehearsal hall to the concert stage.