Wildgame Innovations Flex1000 Programmable Electronic Game Calling System Holds up to 1,000 calls/Large backlit LCD High quality bi-directional speaker system/Preloaded with 100 categorized calls Long-range, remote-control activation/Docking station recharges remote control unit Unit and remote can activate calls/Remote uses 1 Lithium Ion battery Uses 8 AA NIMH rechargeable batteries