This is the Kyosho Syncro KR-331 2.4GHz Receiver, as used in the RC Surfer 3.
This product was added to our catalog on October 11, 2016
Friday, Dec 1 2017 (about a year ago)
Kyosho Syncro KR-331 Receiver
No problems they seem to be on back order a lot recevier comes stock on RTR Kyosho ultima sc6 I also bought 2 more for my other trucks