With seemingly nothing new here, the Boss Micro Monitor combines a tuner, metronome, and headphone amp all in one module for $70.  Featuring three types of tuning:  chromatic, flat, and accu-pitch, the Boss Micro Monitor also lets you plug in an external MP3 or music source so you can jam along with your favorite tunes.  Read the press release below:

Los Angeles, CA, June 12, 2009 — Just in time for the Father’s Day and graduation gift season, BOSS is pleased to announce general availability of the TU-88 Micro Monitor and Tuner. The pocket-sized TU-88 allows guitar and bass players to tune, play, or jam along with their MP3 player anywhere, anytime.

The compact TU-88 has a small amplifier built-in to facilitate quiet listening to guitar and your favorite stompboxes through headphones. The MIX IN mini-stereo input enables connection to any MP3 player, so players can jam along to their music at the same time. Or, plug the TU-88 into any home stereo system or digital recorder to share the fun with friends.

The BOSS TU-88 also brings stylish, portable, and accurate LCD tuning to guitar players, featuring three tuning modes (Chromatic, Guitar, Bass), Flat Tuning function and ACCU-PITCH verification with an audible beep. A metronome is also included with selectable rhythmic patterns and volume control.

The TU-88 Micro Monitor and Tuner is now available with a street price of $69.00.

Jeff B