فَلَا يَسْتَطِيعُونَ تَوْصِيَةً وَلَآ إِلَىٰٓ أَهْلِهِمْ يَرْجِعُونَ ٥٠
And they will not be able [to give] any instruction, nor to their people can they return.
Your location stays on this device and is only sent, rounded to about 1 km, to fetch the times.