DIY Mini Transmitter 2.4 G DSM2
Suits most DSM2 receivers (spectrum, OrangeRX, DT, Deltang, DasMikro) made with 7 Ch.DT Tx2 transmitter module from microradiocontrol.co.uk Receiver is 10 x 10 X 2.5 mm DasMikro 5 ch from Aliexpress or eBay.
See my channel at Kingsley Kronk K