If you don't need to label a lot of cables and connection panels on a regular basis, you can spend a lot less by getting a general-purpose label printer like the Editors' Choice Brother P-touch PT-H500LI.
Easy to use; Prints by itself or from a PC; Wi-Fi and USB connections; Automatic cutter; QWERTY keyboard; Rechargeable battery
A little too big and heavy to qualify as a truly handheld printer