1.How long is the RF transmission distance?
2.What kind of battery installed in outdoor device?
3.How to reset indoor device and What have changed after resettings?
4.Whether the indoor device’s ringtone can be adjusted?
5.Whether D1 has night vision effect?
6.D1 Lens and Visual angle
7. Whether the 5 GHz router is available for D1 indoor camera
8. Whether D1 have Listen and Audio functions？
9.Will it Push one picture to phone APP every pressing
10.how long can the pictures keep saving in phone APP message center