400W Ajustable Treble / Bass Frequency Divider Distributor 2-Way Speaker Audio Crossover Filters | Large capacity, reasonable design, beautiful appearance, quality achieve full self control. | Inductance adopts anaerobic copper winding , and pure copper wire. | The crossover soprano + available bass binary frequency sound box, can also be used in 2.1 the high small satellite box and automotive loudspeakers. | Implementing overall debugging, no welding, using very convenient, and listening to the sound effects can implement debugging control according to their own interests.

This is D1 mini, it is a mini NodeMcu Lua WiFi board based on ESP-8266EX. | D1 Mini NodeMcu Lua 4M Bytes WLAN WiFi Internet Development Board Base on ESP8266 ESP-12F for Arduino, 100% Compatible with WeMos D1 Mini | 11 digital input / output pins, all pins with interrupt / PWM / I2C / support 1 line (except D0); 1 analog input(3.2V max input). Micro USB connection; Compatible with Arduino; 1MB Flash; 500mA resettable fuse. | WIFI development board,4M bytes.5V 1A switching power supply (switching power supply）onboard. | Our D1 mini development board compatible with Arduino WeMos and can be programmed in the Arduino IDE.

1.Dimension of Module: 12.8X3.3X1.3cm(5.04X1.3X0.51in) | 2.64 fixed screw holes with 3mm in its diameter | 3.A single module can drive a 8x 8 dot matrix common cathode | 4.Equipped with input and output interfaces, support for multiple modules to cascade | 5.MAX7219 Dot Matrix Module Red Light for Arduino Microcontroller 4 in 1 Display with 5pin Line