Logitech R500s / Presenter 910-005843

Quick overview from the supplier:

Presenter Logitech R500s, Class 2 Laser, Range: 20m, Bluetooth/2.4 Ghz, 1xAAA, Graphite . Dimensions Presentation remote Height 123.6 mm Width 36.6 mm Depth 24.7 mm Weight 48.4 g, included Battery (not including Receiver) Receiver Height 6.6 mm Width 17.5 mm Depth 25.0 mm Weight 2 g Technical Specifications Laser Class 1 laser Max output less than .039 mW Wavelength 640-660 nm (red light) Battery Indicator Lights (LED) Battery and Connectivity LED Connectivity Connection Type Bluetooth low energy technology and 2.4GHz wireless connection Part Number Graphite 910-005843 Mid Grey 910-006520