Plug [Q] Pairing with pin-less bluetooth mouse in 4.1.2, Mission: impossible

Hi, I have an Acer Iconia B1 tablet, and I'm stuck with Android 4.1.2.

I'm trying to pair with a Verbatim 96674 bluetooth mouse, but the pairing process insists in asking for a PIN code, and does not allow to pair without it. The small catch is that this (and probably any bluetooth mouse on earth) does NOT require a PIN.

I have tried every single bluetooth pairing app from the store, without success. The "bluetooth pairing" app (com.jpn.frontia.waka.Bluetooth) almost worked, but it never paired the mouse, while "blueinput demo" ( reports that my Android "does not support HID", and when trying to pair using SPP, it does not work either.

The question is, can I pair manually with some of those bluetooth SPP apps in the store? Is there ANY chance of pairing this mouse with Android 4.1.2 or getting a bluetooth mouse with security PIN?

Thanks in advance.