I'd call a basic DocWagon wristband equivalent to "standard personal electronics" (rating 2), a gold wristband "security device" (rating 3), and a platinum wristband "high-end electronics" (rating 4) on the Device Ratings Table (SR5, p.421)
DocWagon contracts come with a wristband or RFID implant that must be triggered by the user before it signals for help (SR5, p.450). A jammer generates Noise equal to its device rating (SR5, p.441). You need at least a rating 2 jammer to counter a basic DocWagon transmitter, more if the target has any Noise reduction in their PAN (SR5, p.240, p.421).
There's a chapter on DocWagon and similar providers in Chrome Flesh ("Fixing What's Broke," p.26-53). At gold level, a biomonitor in the wristband or RFID chip costs extra (CF, p.31). SR5 puts the cost for a biomonitor at 300 nuyen (p.450). At platinum level, the biomonitor is included (CF, p.31-32). At gold and platinum levels, if a biomonitor detects a problem, the user is prompted to trigger the alert, but it doesn't happen automatically (CF, p.32). At super platinum, the user gets the same prompt, but if the user doesn't respond in 60 seconds, an emergency recovery team gets dispatched automatically (CF, p.32)