Hiboy's new version X300 charger prevents backward plugging risks. Hiboy brand new version charger replacement works as genuine parts. For Hiboy X300 ONLY. Indication Light - Red light on when charging, green light on when fully charged. Please note this product can't be returned. X300 Charger has new and old versions. For purchase guidance, please contact our customer service team at us.support@hiboy.com and provide product images for assistance.