Designed to be modular and backwards compatible, it can be mounted in a number of different locations. For V4 kits, it can be mounted next to the steering servo, or, if you're not running mechanical brakes, it can be mounted in the back for better weight distribution.
Additionally, the V4 RX Box is backward compatible with all of the V3 kits. If you're not running mechanical brakes, this RX box will plug right in.
There is an integrated antenna mount that is secured with a set screw, so it'll never come loose :)
It is also a very useful box for many DIY projects.
(1x) RX Box, (2x) M3x6mm countersunk screws, (2x) M3x6mm button head screws