2-Pack DC Power Supply Adapter, Plug 5.5mm x 2.1mm,Center Positive,for Arduino UNO R3, Arduino Mega 2560, Massage Gun and More,6.8FT Cord,UL Listed (Pack of 2) - Security-01 9V 0.5A

• UPC   700161528756
• 【Specification】: Input voltage: AC 100-240V 50/60 Hz, Output: DC 9V 0.5A (500mA), Connector Size: 5.5mm x 2.1mm, Cable length: 2M(6.8FT) 【Center Positive】: Power supply polarity: Center or Tip is positive (+), Sleeve is negative(-), PLEASE NOTE THAT this power supply only works with centain devices with center positive, refer to the following list 【Works with】: Arduino UNO R3, Arduino Mega 2560 / Nixie tube clock / Elegoo, 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. 【DOES NOT Fit】: Effects Pedals, Drum, DJ controller, Piano keyboards, Label makers and other equipment with power ports of negative-tip (Center Negative). Not applicable for devices that withstand minimal electromagnetic interference, such as radio set. 【Certificate & Warranty】: Certificated by UL ,ETL, CE and FCC. 2-Year Warranty & 30-Day Return without Reason.