It says G6 on the box I've use the G7 on a free trial so no these are 6.Welcome to the forums @betzee.
Are you sure you've got some G6s and not G7s? The G7s have inbuilt transmitters.
But yes, the G6s require a transmitter which lasts 3 months once activated.
That's a shame. The G6s and G7s are the same price in New Zealand (where I am) but if you have to buy the transmitter separately it's not cheap. Hopefully your pharmacy has just forgotten to give you a transmitter and you won't have to pay for it separately.It says G6 on the box I've use the G7 on a free trial so no these are 6.