Description: Module size: Approx. 4 x 2.2cm / 1.57 x 0.86 inch Color: Golden Brand new CH340G original chip Switchable output TTL level 3.3V/5V (with jumper) 3.3V and 5V output voltage to supply the programmed controller With power light PWR, TXD and RXD indicator light Used to upgrade various device Used for different diagnostics Can be used for Gas LPG ECU interface adjustments