Is the system waterproof ?
Yes the system is IP65 standard
How many TT devices can I connect to one router TT CLOUD ?
In principle 256 but in reality to avoid collision of data packets we suggest 20 devices
How long batteries will last ?
Batteries pack comes with a built in solar panel. They are high efficiency Li-Ion rechargable batteries.Typically for TT models with heating probe (TT-F, TT-W) battery life can be considered more than 30 days.