This is the Carrera Digital 2.4Ghz Wireless and Receiver Station

10112 Wireless Receiver for use only with Digital 1/24 and Digital 1/32

Features of 2.4 GHz Wireless+:
2.4 GHz WIRELESS+ radio controlled technology
Race for up to 6 drivers
Ultra-light, wireless speed controller
Recharger with direct connection to the Carrera circuit
Operating range up to 15m
Uninterrupted and frequency independent due to frequency hopping
8 hours of non-stop operation
Battery powered with Lithium Polymer power pack

Package includes the receiver only, typically purchased as a replacement as 1 receiver will program all 6 of your controllers.