Testo 0440 5504 Back Cover and Hook for 550 Series (No Bluetooth)

Testo 0440 5504 Battery Cover for Testo 550, 557 with Hook

Because of the change in style between newer (newer have BlueTooth) and older Testo 550's, replacement of the back housing may be required in order for unit to accept the new style Battery Cover and Hook assembly. This kit includes all you will need for a replacement battery cover.