brand new and high quality. Features: 29.4V 2A lithium battery charger Red light charging * green charging end. Related parameters:Input: AC100 ~ 240 v Output: constant current voltage regulator DC29.4V -2A for DC output line: soft envelope for DC plug: DC5521 for head, for head diameter of 5.5 MM core 2.1 MM socket Specification: Corrugated noise: built-in EMI filter, ripple minimum, the noise is small (MAX 280 MVP - p) Charging mode: constant current, constant voltage (CC - CV turn flow range fifty to 150 ma) Short circuit protection: load after the termination of the short circuit, the charger will automatically return to normal work Over current protection: flow troubleshooting, the charger will automatically return to normal work Over voltage protection: output voltage more than rated voltage, the charger will protect, troubleshooting must restart charger after can resume normal work Overload protection: 105% ~ 150% (FOLDBACK current limiting output reset: automatic restoration) Instructions: charging, light red; Filled, light green, Light, light green, Failure, the lights flashing. Products applicable to:Suitable for 7 series lithium (lithium ion, lithium polymer) battery size:11.5x4.8x2.8cm(4.5x1.91.1in) Notes: 1.The colors deviation might differ due to different monitor settings. 2.We provide you with the best product and service, if you have any problem, please let us know, and we will solve the problem ASAP. Thank you so much. Package includes: 1Xcharger