The red ST-2 super tight clip-On all instrument tuner from SNARK is a clip-on tuner that utilizes a high-sensitivity vibration sensor or an internal microphone and a full-color display that rotates 360°. This update to the original SN-2 tuner boasts a faster and more accurate tuning chip with a higher-definition display. It can be used to tune any instrument for applications such as rehearsals recordings live stage theater and more. The SNARK ST-2 tuner features a stay-put clip.