This is the Venom AC/DC Powered 2-4S LiPo Balance Charger.

FEATURES
Charges 2-4S LiPo of LiFE battery packs
Simultaneously charges two 2S packs, or a single 3S or single 4S
LiPO or LiFE pack
Automatically identifies cell count and adjusts charging amperage
May also be used as a voltage checker by manually setting the
charge current to zero
LCD display
30 day limited warranty through Venom beginning at date of purchase

INCLUDES
AC/DC Powered 2-4S LiPo Balance Charger, DC Cable with Alligator
Clips, 3-Prong AC Cord, Instruction Manual

SPECIFICATIONS
Charging Power: 40W
Current Range: 0-3.0A
Charge Port: JST-XH 2.5 port
AC Input: 100-240V
DC Input: 10-18V
Dimensions: 5.6 x 5.1 x 1.9" (142.2 x 130 x 48.25mm)
Weight: 10.8 oz (306g)