switching power adapter 1.Power Interchangeable adapter 2.fixed frequency control circuit 3.Meet all related safety standard ... of chargers , car chargers, travel chargers, usb chargers, phone chargers, adapters, ac/dc adapters, power adapters, wall mounted switching adapters, etc. We ... standard: UL/EN60950/GB4943 (for IT) EMC standard: EN55022 class B/FCC part 15 class B and EN55024/A1: 2001/EN61000