The GY-906 MLX90614 is a high precision infrared non-contact thermometer module with I2C interface and 5V or 3.3V operation. KEY FEATURES OF GY-906 MLX90614 NON-CONTACT PRECISION THERMOMETER MODULE: Non-contact measurement perfect for measuring temperature of moving objects. Temperature measurement range: -70°C to +380°C I2C/SMBus interface Optional PWM and interrupt output 3.3V or 5V operation (B.2)