SBIG 110V AC to 12V DC Power Supply with Correct Polarity and Locking Ring for ST-402ME Camera

This 110V AC to 12V DC supply is a replacement for the power supply that is included with the ST-402ME camera. The polarity is correct for this product (center pin positive) and the plug has a locking ring to hold it in place. The locking ring differentiates it from a similar supply with negative center pin used for the STV.