Specifications: Display: 2 lines × 16 charactersBacklight: blue with white cartoon colorLCD protocol: HD44780 Pin definition: VCC, GND, SDL, SCA Contrast adjustment : PotentiometerBacklight Adjustment: HeaderDefault Address: PCF8574T Chip 0x27; PCF8574AT Chip 0x3F Working Voltage: 5V 100% Satisfaction Guarantee12 Month Warranty; Not Satisfied , free returns; We can also reship for you due to quality problems. Package: 2 packs blue 16x2 1602 LCD screen display + I2C serial interface
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