Item Specifics: Model Number:HK-IDP-8AA Type: Battery Storage Box Material:ABS impact resistant material Hardware: nickel plated steel Spring: nickel plated steel Rivet: no Wire: 1007# 26AWG Exposed wire length: 150mm with DC2.1 head Color:black Plug size:OD-5.5mm / ID-2.1mm / Barrel Length-10mm 1x 8 AA Battery Holder Box Case (Battery not included) Product Description 100% Brand new and high quality This is for a Brand New Battery Holder Box Case with 8 AA Battery Capacity. The case has a 5.5mm barrel plug cord and a built-in on/off switch. You can put 8 AA batteries to create a 12V battery power pack. Most AA rechargeable batteries are 1.2Volts and most disposable alkaline AA batteries are 1.5Volts. The holder is wired in series, so the voltage is eight times the voltage on a single battery. This battery holder box can be used in toys, RC cars, lighted decorations, electronics projects, or anywhere else where you need to have 12V of DC power. This battery case comes with a 5.5mm plug which can be removed if you prefer to hard wire it. The wires are marked positive (Dashed) & negative (Letters) so it's easy to tell polarity. The case has a built-in On/Off switch. This adapter also works to power our 12volt DC hanging ceiling fan. Features: Durable plastic case Slide lid 12" Coded wire leads for easy installation when removing barrel plug Built-in On/Off Switch Plug size: OD-5.5mm / ID-2.1mm / Barrel Length-10mm Dimensions: 12.50x7.00x2.00cm (L*W*H) Color: Black