5 Pcs 3.3V 5V TTL Bi-directional Logic Level Converter Geekcreit for Arduino - products that work with official Arduino boards

5 Pcs 3.3V 5V TTL Bi-directional Logic Level Converter For Feature: 2 channels of high-voltage logic and low-voltage logic bilateral switching 2-channel of high-voltage logic switch low voltage logic  into unitary transformation Size: 15.5mm x 16mm x 11.5mm Module is compatible with the breadboard, it can be put on the breadboard directly Description: High Voltage: 5V Low Voltage: 3.3V GND for negative power 5V TTL RXI input, 3.3V TTL RXO output TXI input/output of 3.3 V TTL, TXO input/output 5 V TTL, TXI and TXO bilateral switching Package included: 5 x Logic Level Converter