1. Exactly AC power charger adapter for your HP Networking 2. Input: AC100 - 240V 1.5A 50-60Hz 3. Output: 19V 4.74A 4. Output Tips: 7.4 mm x 5.0mm 5. Compatible Laptop Models: for HP 4431S / CQ35 / DV4 / DV5 / DV6 / CQ32 / CQ40 / CQ42 / CQ45 / CQ57 / CQ61 / CQ71 / CQ62 / CQ70 / 4321S / 4230S / 4441S / 4326S / 4421S / 4431S / 4320S / 4330S / 4415S / 4436S / 4441S / 4446S / 4515S / 4525S / 4540S / 4720S / 6360b / 6450b / 6455b / 6465b / 6540b / 6545b / 6555b / 6565b / 4410S / 4425S / 6515b / 6715b / 8510p / 8510w / 8710w / nc4400 / nc6230 / nc6320 / nc8430 / nw8440 / nw9440 / nx6325 / nx7300 / tc4400 / nx6110 / nx6120 / nx6130 / nx6310 / nx6320 / nx6325 / nx8420 / nx9420 / nc2400

http://olla.gr/ac-adapter-19v-4.74a-for-hp-networking-output-tips-7.4mm-x-5.0mm/