The ornamental design for a wireless remote controlunit for cameras, as shown and described.
1. Wireless remote control unit for cameras
1.1: Perspective
1.2: Perspective
1.3: Front
1.4: Right
1.5: Left
1.6: Back
1.7: Top
1.8: Bottom
Fig. 1.1is a top front right perspective view of an embodiment of the wireless remote control unit for cameras; fig. 1.2is a top rear right perspective view; fig. 1.3is a front elevational view; fig. 1.4is a right side elevational view; fig. 1.5is a left side elevational view; fig. 1.6is a rear elevational view; fig. 1.7is a top plan view; fig. 1.8is a bottom plan view; the broken lines illustrate an antenna not forming part of the claimed design; the shading lines represent an approximate three-dimensional contour, not intended to indicate surface decoration.