1.2GHz 700mW 15 Channel Digital Wireless AV Receiver and Transmitter ESXF700mW
[E4392]

Excellent device for FPV, transmitter can be used without case (about 46g aluminum case only), antenna is about 23g, good to replace by cloverleaf. Transmitter itself with thermal sink is about 23g - not bad! Reserver is very good, has 28 channels (transmitter has 15 channels).

Here is modification log:
https://sites.google.com/site/flyingoulu/fpv/video-trans-
mitter-and-receiver