The IMT-203 cobmines a violin/chromatic tuner and thermo-hygro meter in a compact and slim body for mostly portable use. Most advanced tuning algorithm (+/- 0.5 cents). Dedicated violin and chromatic dual tuner. Quadra flat tuning, internal microphone and external jack. Re-calibrate from A=430 to 449 Hz. Easy-to-read LCD tuning meter. 3 coloured LED tuning guide. Non-volatile memory keeps all settings. Automatically returns to the hygrometer mode when no sound is coming in for 3 months. Temperature range: -10 C to +60 C (+14F to +140F), Tolerance: +/- 2%, relative humidity: 20 to 90%, Tolerance: +/- 5%, Recording function saves the highest and lowest temperature and humidity, Measuring interval: every 15 seconds. Ultra long battery life, Built-in stand for table top viewing, Recessed on/off button, Compact and slim size for portable use.