3rd Generation

T-30
T-30
Button key insert is blue
T-52
T-52

Button key insert is green
T-70
T-70

Button key insert is red

2nd Generation

TB
TB
Button key insert is blue
TE
TE

Button key insert is green

1st Generation

TE/TC
TE-TC

Button key insert is grey, LED is Green
TB
TB

Button key insert is grey, LED is Red
Product Support : Touch Button Locks