USG Professional Analog CCTV Tester: 3.5" LCD Screen, Industrial Grade Housing & Buttons, 12V DC Power Out To Power Camera, Rechargeable Lithium Battery, 0.5W Buzzer, Charger + Accessories *** #1 VOTED BY CCTV INSTALLERS *** DESIGNED FOR PROFESSIONAL USE *** WILL OUTLAST ALL OF YOUR CCTV TESTERS GUARANTEED! Comes with rechargeable batteries through USB port. One charge lasts up to 6-8 hours of heavy use. Power Output: 12V/500mA *** Provide power to camera you are testing! *** Built-In 0.5W Buzzer Plugs: BNC Video In, RCA Audio In, 12V DC Power Out, RCA Audio Out, RCA Video Out Accessories Included: Two AV Cables, Metal Mount, Manual, Charger, Battery, Wrist Strap, Screws + Anchors