I think the most usefull electrical equipments are those:
1. MP3 Player: Is very useful because years ago, If you wanted listen one song you had to buy all the cassette or Cd. Nowadays, you only have to plug Mp3 in the computer and then you can already listen the song.
2. Mobile Phone: If hoy have a movile phone, you can be disponible 24 hours a days, and you can be in contact with all of your friendas and family. And if you ever ara in danger, movile phone will be your salvation.
3. Remote control: With this, you don't need stand up of your sofa to change the channel of your TV. You only have to press the buttons of the remote control, and authomatically it will change the channel you want to see.
4. Digital Camera: Years ago, when you wanted to take a photo and after see it, you had to go to the shop and pay to deelop the pictures. With a digital camera you can see the picture in the same moment you take it.
5. Laptop Computer: With a laptop computer, you can always do computer work, and you can be connected to internet everywhere you are because you can bring the computer with you.