Intelli IMT-203 Violin Tuner with Thermo/Hygro Meter Dedicated for Violin plus Chromatic dual tuner with a Thermo-Hygro meter. Recalabrates from A = 430-449Hz. Internal microphone and external jack, Easy-to-read LCD tuning meter, 3 colored LED tuning guide, Non-volatile memory keeps all settings Temperature range: -10C to +60C(14F-140F) - Tol:+ / -5 - Recording function saves the highest and lowest temperature and humidity. Ultra long battery life - Built in stand for table top viewing - Recessed on/off button - Two year warranty - Compact and slim design Intelli Quality.Automatically returns to the hygrometer Relative humidity: 20 to 90. The most advanced tuning algorithm, + / -0.5 cents and quandra flat tuning.