MY GEIGER COUNTER SAYS 0.109 mR/h as you can see in one of the pictures, so it is good for testing your Geiger Counter. 4-65A Vacuum Tube with URANIUM GLASS seals and a NICE UV GLOW.
Item Tag: 4 A
4 Amp Power Supply for powering auto 12 Volt CB radio or Stereo to house current
Older models never used, They have been tested. Boxes may be soiled