Keyboard source: Desktop 2 v1.0.5 Dongle source: 1. Desktop 2 v1.0.5 dongle hex; 2. Desktop 1.2.2.293 dongle hex
I found it is very defficult to pair the keyboard with 2.4G dongle. Press pairing button thousand times. Also, Try power off and then on thousand times. Then, FINALLY it can work on Desktop 2 v1.0.5 dongle. But, never succeed on Desktop 1.2.2.293 dongle. Instead, it's very easy to connect this keyboard to BTLE. Did you realize this problem? Thanks.
