TTL level: 3V3. With reinforced strain relief cable design for repeated bending and pulling.
Industrial USB to TTL Adapters USB to TTL Adapters Cable Reinforced Shielding
Durability USB to TTL Cable USB to TTL Adapters Cable FTDI Chip Stable to Use
USB To TTL Interfaces Cable Reliable Chip USB to TTL Adapters Cable
Suamdoen USB to TTL UART 3V3 Serial Cable with FT232RL Chip 3.3V TTL to 3.5mm Audio Jack Output Cable Works for PLX SM-AFR, TTL-232R-3V3-AJ
MEIRIYFA USB to TTL Serial Adapter Cable 5V to 3.3V UART Converter Wire, USB to TTL TX RX VCC GND Pinout Signal 4 Pin Female Socket with FTDI FT232RL Chip for Windows 10/8/ 7/ XP/Vista Android (1M)
USB To TTL Serial Port Download Cable, PL2303TA USB To TTL RS232 Module Converter, Serial Cable Adapter, for Win XP/VISTA/ 7/8/8.1(1pc)