The previous version wasn't wifi, but this one is! There was a "connect" version but that was a bit of a faff with a laptop. This version is connected via wifi to an app. Bluelab Wifi - Always On. Being there Optional.

Monitor your reservoir pH, Conductivity and Temperature with alerts on your phone when using the Wi-Fi capable Bluelab Guardian Monitor.

• Built-in Wi-Fi (with the option to disable it)
• High/low pH, temperature, and conductivity alarms
• Non-volatile memory – keep settings through power loss
• Plant-safe green LEDs with adjustable display brightness
• 2 metre / 6.6 foot measurement probe cables
• 110 – 240 VAC (Mains powered)
• Interchangeable power plug
• Replaceable Bluelab pH Probe (with BNC connection)
• When connected to Edenic by Bluelab app:
• Instant alarm alerts to your phone 
• Remote monitoring and control
• History reporting to assist data-driven decision making