You can carry this credit-card-sized metronome in your pocket!
Features a mode with combined beats (2+3, 3+4, and so forth), tap tempo, tune mode with chromatic tuning and fine-pitch adjustment, timer mode with 60-minute timer in one-minute increments, stopwatch function, and headphone jack for discrete monitoring.

Features:

• Combined beats capability
• Chromatic tuner
• 60-minute timer
• Stopwatch function
• Headphone jack