Perfect very good buy

good image, completely autonomous thanks to its integrated battery, worn> 20 mm ^ to me through walls
the choice of channel is 1,234 per switch, on off by button, which completely disconnects the battery, microphone sensitivity is very good, I get clear pictures and good colors.

I do not see where there needs a manual to use this device! it must be on a 2.4GHz receiver !!!!!!

I highly recommend this purchase !!!

(I have no business relationship with the seller!) When a product is good it must be said too.