RYAN O'NEAL'S SON Equipped with Monitoring Device

1009_Redmond_oNeil_getty_exd
Ryan O'Neal
's 26-year-old son Redmond got one hell of a parting gift during his sentencing last week for a probation violation -- a state-of-the-art GPS monitoring bracelet.

Redmond's probation was revoked in September -- after he allegedly snuck out of rehab and ordered drugs on a payphone -- and last week, a judge sent him back to the treatment facility ... with the monitoring device around his ankle.

1009_redmond_sub
According to law enforcement sources, the device features real-time cameras that take a snapshot of Redmond's whereabouts every five minutes -- and if he steps outside his assigned area, an alarm goes off.

Redmond -- who's had a long history battling drugs -- pled no contest to drug and weapons charges back in August ... and was sentenced to a year in rehab.

If Redmond screws up again, he faces up to six years in prison.