The phrase "activate remotely" is correct and usable in written English.
It can be used in contexts where you want to indicate that something can be turned on or controlled from a distance, often in relation to technology or devices.
Example: "You can activate remotely the security system from your smartphone while you are away from home."
Alternatives: "turn on from a distance" or "control from afar."
These included bids to extract personal information from data transmitted by apps including Angry Birds, as well as a range of capabilities to activate remotely the microphone on iPhones and Android devices – a project codenamed Nosey Smurf.
While a shrinking number of devices that you might want to activate remotely take standard cells these days, the campaign's Indiegogo page depicts small lamps, radios and baby monitors as examples.
The patch also contains heating elements that can be activated remotely to release drugs.
The front, back and garage doors can be activated remotely with an e-mail.
Even more impressively, she's a sleeper doll, who can be activated, remotely, with use of codewords, over the phone.
It features an internet-connected digital camera inside the fridge that can be activated remotely by a mobile.
Secondly, they can be activated remotely, which means you never need to worry about whether you locked the front door, because you can always do it from afar.
Scientists are claimed to have identified highly-classified "back doors" in chips used in Lenovo machines which are extremely difficult to identify and could be activated remotely to either stop targeted computers working or access their contents.
Thanks to these features, these connectors can be used in high-energy particle accelerators, especially in radioactive areas, where thermally induced mounting and dismounting operations can be activated remotely.
But unlike typical stage effects, in which an actor triggers the blood spurting from a pellet or small bag built into a garment or stashed on the set, here the blood-delivery system is in Ms. Cucchiaro's shirt, and it is activated remotely by the stage manager.
Proposed 'kill switches' would be activated remotely by phone owners whose handset had been stolen.
