2 x AAA batteries, not included. White back light. Work temperature: 10~30 degree celsius. Unit selection: G OZ OZT DWT CT GN. Bottom electric alarm function. Function: Temperature (degrees Fahrenheit and Celsius) display clock, calculator functions, weighing function, counting function, the valuation function. Function keys: MODE/ON button for the mode conversion, under normal condition for clock temperature mode, press this button will be weighing - calculator - temperature cycle of transformation between the clock. [UNIT/MUTE] button for the UNIT conversion [UNIT] when weighing, temperature display, time frame is used to set a buzzer sound on/off [.mute]. [TARE/SET] button in weighing the picture used for zero (TARE), the time temperature display screen is used to SET numerical [SET]. [PCS / =] weighing mode PCS samples confirm key for counting function, function for the equal sign when the calculator (=). [PRICE/] PRICE for weighing unit PRICE confirmation key, push for the calculator a delete key.