Features: Two micro receivers KR-211FH included. Other compatible receivers: KR-418FH, KR-415FHD, KR-413FH, KR-241FH, KR-211FH, KR-212FHG. *This products does not include the Manual in the package. Please download manual from here. (Manual is same as for EX-RR ver2.0 software. But Grip Unit is different at EX-RR and EX-2, please attention this difference.) Specifications: Dimensions 240×163×107mm Weight 528g (without battery) Battery RO3/AAA/UM4 battery x 4 Current 150mA Using time 6 hours (depending on type of battery used) Channels 2 Frequency 2.4GHz (FHSS) Model memory 40 Includes: Transmitter EX-2 Select Pack1 - 1pc Master Unit EX-2 - 1pc Xpansion Unit (ver2.0 firmware) - 1pc Drop Extension Steering Unit - 1pc Basic Grip Unit - 1pc Normal Stand Unit - 1pc Micro Receiver KR-211FH - 2pcs