KRTED cordless jigsaw, which appears to be a 48V model based on the battery pack visible in the image. While the image shows "48V" on the battery, search results indicate similar models are often listed as 36V, like the Hikoki CJ36DB.
Here's some information about this type of tool:
Function:
Jigsaws are used for cutting intricate shapes and curves in various materials, primarily wood, due to their narrow, reciprocating blade.
Features:
Cordless jigsaws like this KRTED model offer portability and freedom from power outlets. Features often include variable speed control, orbital action for faster cutting, and tool-free blade changes.
Battery:
The KRTED jigsaw uses a lithium battery, as indicated by the "LITHIUM" label on the tool and the "High-energy lithium battery, durable" text on the battery pakage