Lemon Tuner has built-in preset adjustments for up to four instruments and vocals, providing real-time pitch adjustment for musical instruments such as guitar, saxophone, violin, etc. Moreover, Lemon Tuner offers customizable pitch gauges and @ 440hz standard adjustment to meet the diverse needs of users.

Emphasize the diversity and practicality of preset adjustments, highlighting Lemon Tuner's professionalism and targeting.
Replace "tuning" with "pitch adjustment" to more accurately convey Lemon Tuner's features.
Use "diverse needs" to better represent the varied users and occasions Lemon Tuner caters to beyond musical performances.