9V 1A Power Supply Adapter, DC Jack Center Positive, Plug 5.5Mm X 2.1Mm, for Ard

--Input voltage: AC 100-240V 50/60 Hz, Output: DC 9V 1A (1000mA), Connector Size: 5.5mm x 2.1mm, Cable length: 1.8m\n--Power supply polarity: Center or Tip is positive (+), Sleeve is negative(-), PLEASE NOTE THAT this power supply only works with centain devices that requires 9Vdc center positive input, refer to the following list\n--Works with: Arduino UNO R3, Arduino Mega 2560 / IEIK UNO R3 / MEGA 2560 / Schwinn elliptical machine, A10 A15 A20 A25 A40 103 120 130 213 220 240 430, Schwinn bike, Lansinoh smartpump and Lansinoh SignaturePro\n--Compatible with: TP Link Tapo Security Camera C100 C200 C210 C310 C320WS TC60 TC70\n--Note: Please carefully check the required polarity and socket size of your devices before purchasing. A correct polarity is critical, a center negative pedal or device will not run on this adaptor\n--Safety: UKCA WEEE RoHS certificate, Six-level energy efficiency, Over-Voltage protection, Over-Current protection, Over-Heat protection, Short Circuit protection\n.