It is but hawa bhrwany ki zrurat pri nahi since I installed them. So far I love them. Also, I wanted to test the external TPMS system before ordering the internal one as it requires visiting a tyre shop and also you cant change the batteries by yourself on that one. So I thought I'd first see about the precision and utility of the system before cutting off the nozzles off my tyres. But now that Ive used it, I think the internal ones are worth it.
Only issues, the internal unit has some rattling sound. I don't know why maybe some cheap motion sensor? Dusra msla the solar charging is kinda too slow. Aur sb se bra msla, I find myself distracted from driving when it is on the dashboard and it has caused me to hit my car in a wall kinda thing when reversing