The Philips Hue Tap Dial Switch cannot be used directly via Bluetooth with the Hue app and Philips Hue Play devices without the Hue Bridge. Here are the key points:

- The Tap Dial Switch uses the Zigbee Light Link wireless protocol, which requires a connection to the Hue Bridge to control the Philips Hue lights.
- Without the Hue Bridge, the functions of the Tap Dial Switch cannot be fully utilised, especially when it comes to remote control and management of more than 10 lights.
- The Hue Bridge is necessary to enable the full functionality of the Tap Dial Switch, including remote control and integration with other Philips Hue devices.