9w, 500mA Universal AC/DC Power Adapter 1.5, 3, 4.5, 6, 7.5, 9 and 12V DC with 4 Foot Cord by Electronix Express

Description

Product description 9w, 500mA Universal AC/DC Power Adapter Switchable DC Output: 1.5, 3, 4.5, 6, 7.5, 9 and 12V 4 foot cord with six different connections 3.5mm OD / 1.3mm ID Barrel Connector 5mm OD / 2.1mm ID Barrel Connector 5.5mm OD / 2.5mm ID Barrel Connector 2.5mm DC Mono Connector 3.5mm DC Mono Connector 9v Battery Snap Connector Polarity Switch - IMPORTANT: WILL NOT WORK UNLESS POLARITY IS SET CORRECTLY Polarity can usually be identified in your device's instruction manual. If you are unable to determine the polarity specification, please contact the manufacturer of the device you want to use this power adapter with. Please note: When testing this power adapter, you must test with a load as this is not a regulated power supply. The no-load voltage will be 1.5x higher than the selected voltage in order to have sufficient current output (this is due to the circuit inside, it is a diode bridge rectifier filter circuit, so the output voltage is higher than the specified voltage when testing without a load ). Once the power adapter is connected to a device that is using power, the power adapter will provide the voltage you selected. If there is an issue, the capacitor storage may need to be discharged before showing the correct reading. Review: Great - This was needed for a wind up radio we have. The cord works great. Very happy. Review: Poor components - Had this for 2 weeks before adapter started giving off an odor. Took it apart and transformer was burning up. Keyboard it was plugged into was barely used/ at correct voltage. Cheap stuff, would not reorder.