This is the Traxxas EZ-Peak Live 12Amp NiMH/LiPo Fast Charger with iD Auto Battery Identification and Bluetooth and two 2890X 4S 6700mAh 14.8V 25C iD Power Cell LiPo Batteries.                                                                                       FEATURES:   Charger;                                                                      Optimized for Traxxas NiMH and LiPo battery packs                               Built-in Bluetooth works seamlessly with the Traxxas EZ-Peak Live app for iOS and Android devices                                               Free EZ-Peak Live app provides access to high definition graphical interface, firmware upgrades, remote monitoring, alerts for up to  four chargers, detailed live charging info and the ability to turn off iD mode                                                              Traxxas iD system detects which Traxxas iD equipped battery is connected and automatically configures settings for fastest charge            iD mode may be switched off through the EZ-Peak Live Application for charging older Traxxas batteries with non-iD high-current connectors                                                                    12A LiPo charging rate                                                          5A NiMH charging rate                                                           EZ-Peak Live Storage Mode prepares LiPo batteries for extended storage                                                                       Charge status LEDs                                                              Thirty day limited warranty through Traxxas beginning at date of purchase                                                                                                                                                        Battery;                                                                      Ideal for the Traxxas X-Maxx monster truck when wired in 8S (30V) configuration                                                                 Integrated iD High-Current Connector with integrated balancing wires                                                                         Hard-wired 12-gauge Maxx battery cable                                          Oversized discharge tabs for minimum resistance                                 Semi-rigid outer construction for efficient packaging                                                                                                 INCLUDES: EZ-Peak Live NiMH/LiPo Fast Charger with iD Auto Battery                          Identification and Bluetooth, Battery Connector, and Balance connector, TRAP2971                                                             Two 2890X 4S 6700mAh 14.8V 25C iD Power Cell LiPo Batteries TRAC2890                                                                                  REQUIRES: LiPo charging bag                                                                                                                                     SPECS:      Charger;                                                                      AC Input: 100-240V, 50-60Hz, 1.5A                                               Charger Output: 100W, 4-19V                                                     Charge Current Range: 1.0-12A                                                   Discharge Current Range: 665mAh                                                 Current Drain for Balance Ports: 665mAh                                         LiPo Battery Cell Count: 2-4S                                                   NiMH Battery Cell Count: 5-8 cells                                              Dimensions: 5.2 x 6.6 x 2.2" (133 x 169 x 55mm)                                 Weight: 1.15lbs (526g)                                                            Battery;