1.      Dependability
Professional mobile DJs hired through a company have an obligation to be present during the day you're going to hold your party. Unlike most amateur DJs, they don't make you reschedule or cancel their service at an unexpected time and leave you in a dilemma about how to fix the mess.
Going to professionals is always the right option. The company websites will also show you the relevant data about the DJ you're looking to hire, including experience and reviews from people about his/her previous performances.
2.      Professionalism
If you don't want your event to turn out to be a disaster, you should leave to the professional mobile DJs. Their experience, along with proper equipment that they carry around, has a higher chance of giving you the kind of event you desire than trying to save money and going DIY to organise everything. In case something goes wrong on their part, the DJ and the company will take full responsibility for it.
3.      Connecting with the crowd –
Professional mobile DJs will know how to get involved with the crowd, how to get them excited, and what songs they'll like depending on the theme of the event and the kind of people present in the party. Mobile DJs generally have decent equipment along with them, thus ensuring that you and your loved ones have a great party.
 
4.      Handling requests on the spot –
As you may have noticed in several DJ events, Professional mobile DJs are put to the test by the crowd by putting them on the spot and asking them to play the song that they want to listen to.
This might seem a simple task, but while you're out on the stage performing for quite some people, being put on the spot to do such a job will seem daunting. Professional mobile DJs know how to handle such situations and won't ruin the vibe of your party at all.