Thieves are now using WiFi jammers to render CCTV cameras useless during home invasions.

Jun Bastoni, his wife and their three young daughters were asleep on the second floor of their home in Berwick, east Melbourne, when two teenagers broke inside at 3am and again at 5am on Sunday.

Usually, Mr Bastoni would be woken up by an alert from his phone that unusual motion was detected on his CCTV cameras.

However, the group of four teenagers - two of whom waited in the getaway car - used a WiFi jammer to render almost all cameras on the street useless.

The interruption of his security system meant Mr Bastoni only realised his Mercedes A45 AMG and Toyota RAV4 were stolen when he found his garage open later Sunday morning. 

'I immediately checked my camera equipment - I'm a cameraman so there's some expensive stuff - and it was only when I turned around that I realised my wife's car was gone,' he told Daily Mail.

'I went to check our cameras and they were all offline. My neighbour's cameras were also offline. 

'There was only one camera down the street that got a glimpse of the getaway car because it's wired to a hard drive.'

Mr Bastoni and his family were left incredibly rattled after seeing their neighbour's CCTV, which captured one member of the group stealing the RAV4.

'I could see the whole event unfolding,' Mr Bastoni said.

'They came in and spent five minutes in the house. We were all asleep upstairs, my three daughters were asleep upstairs, and I didn't hear any of it.'

The little girls - aged eight, nine and 11 - have been particularly spooked.

'I've been trying to make light of it for the kids,' Mr Bastoni said.

'But I've been sleeping downstairs the last couple nights with a baseball bat and hockey sticks.

'The kids are all sleeping with my wife in our room, on mattresses on the floor.'

Mr Bastoni believes his Mercedes was targeted by the thieves on Saturday night.

'We live out of the way and the CCTV shows they knew exactly where they were going,' he said.

'They go around carparks looking for nice cars, stick trackers on them and then go get them later.

'My stolen RAV4 was seen circling a carpark near my house on Monday night - a group of four African teenagers, just like who broke into my house.

'I was in that carpark on Saturday night to pickup pizzas, so I'm guessing that's when they put a tracker on my car.'

While it sounds like a sophisticated system, Mr Bastoni heard the technology is becoming common among criminals.

The father shared a video on Monday detailing the theft of his cars and was told WiFi jammers and trackers are bought by thieves for cheap online, despite jammers being illegal in Australia.

'Anyone can buy this stuff on Temu and AliExpress, it's very easily accessible,' he said.

'Australia would be thousands of packages from China every day - they're not going to catch every illegal order.'

An anonymous tip led to Mr Bastoni's Mercedes being recovered outside Richmond Police Station on Tuesday.

It's believed the thieves handed it over due to significant attention from Mr Bastoni's video, which gained more than 300,000 views.

His RAV4 remains missing and is not expected to be recovered.