How many module extensions does MotoZ support? how much is it?

At present, MOTOZ*** supports five kinds of module expansion, mainly relying on the 16 pin interface contact at the bottom of the back shell for function expansion. MotoZ back shell module, used to realize personalized back shell, price 129 yuan; Battery module, which can be used to improve the battery life of MotoZ, costs 499 yuan; JBL speaker module that can be used to improve the external sound quality of MotoZ, priced at 699 yuan; Projection module, mobile phone can be used as a projector, price 1999 yuan; Hasselblad camera module, which can effectively improve the photography ability of mobile phones, costs 2299 yuan.