The display screen is used as a serial port screen: GND is connected to B-, TX, RX is connected to RX, TX of BMS, VCC is connected to B+, and the serial port UART baud rate "9600; When the display screen is used as a Bluetooth screen, connect GND to B- and VCC to B+. VCC voltage range: 6V to 100V.
Size: 63.8 x 38.6 x 15.3 mm (2.51 x 1.52 x 0.60 inch)