Redfish Instruments is a premier hardware, solutions company, specializing in design and development services for the next generation of Bluetooth & Bluetooth LE equipped tools and test instruments. Our Products: Redfish iDVM510, IDVM550 A fully-featured professional multimeter, so you can use it as your everyday multimeter for taking all the measurements you require. But the advantage of using the iDVM is that it connects over Bluetooth-LE to your iOS or Android device to enable you to interact with your data and utilize it in ways that simply aren't possible with a traditional multimeter.