From a Wixey press release July 9, 2018

In 2006 Wixey introduced the first compact digital angle gauge for woodworking. These gauges have become one of the most coveted workshop setup tools for accurately and quickly setting saw blades, machinery tables, and jointer fences. The new Wixey WR300BT Smart Angle Gauge with Bluetooth
has audio output when used with your smartphone. This product was designed at the request of blind and visually impaired woodworkers. The suggested retail price is $49.99.

Exclusive Features:
The WR300BT has identical functions and features as the WR300 Type 2 when used without a smartphone.

When used with a smart phone:
Automatically pairs when APP is selected
Gauge reading is shown on the smartphone
When “Talk” is selected the gauge reading is spoken in any language
Pressing the virtual buttons on the APP controls the gauge remotely

Precision and Accuracy:
Range: +/- 180 degrees
Resolution: 0.1 degrees
Audio Resolution: 0.1 or 1.0 degrees
Accuracy: +/- 0.2 degrees
Repeatability: +/- 0.1 degrees

Backlight: for easy viewing

Turn your smartphone into a free Wixey Angle Gauge
Download the “WixeyTalk” app from the App Store for free
(Apple available now Android coming soon)