Main trade-off
Voice Caddie SC4 Pro
E6 compatibility is not available on Android according to Voice Caddie's comparison page.
Head-to-head
Choose SC4 Pro for simulator support, spin and direction feedback or SC300i for standalone range practice with a longer stated battery rating.
Before you choose
Five feet behind plus ten feet ahead yields fifteen feet, with swing and net safety still outside that sum.
What this is based on
5 + 10 = 15 feet. The front segment is the manufacturer's recommended layout.
Main trade-off
E6 compatibility is not available on Android according to Voice Caddie's comparison page.
Main trade-off
It does not provide club path or face angle.


Compare Voice Caddie SC4 Pro and SC300i by indoor placement, simulator use and practice workflow. See whether the extra features fit how you train.
Choose SC4 Pro for simulator support, spin and direction feedback or SC300i for standalone range practice with a longer stated battery rating.
Winner by situation
Five feet behind plus ten feet ahead yields fifteen feet, with swing and net safety still outside that sum. 5 + 10 = 15 feet. The front segment is the manufacturer's recommended layout.
Twenty hours is twice SC4 Pro's ten-hour claim. The difference matters for long range days, not simulator compatibility. 20 ÷ 10 = 2.0. These are manufacturer upper ratings under their own conditions.
Twelve hours is two beyond SC4 Pro's rating and eight below SC300i's, assuming no charging between sessions. 3 × 4 = 12 hours. 12 - 10 = 2. 20 - 12 = 8. Idle time and aging can change actual endurance.
SC4 Pro lists ten hours and SC300i up to twenty. SC300i suits a long standalone range day, while SC4 Pro's display and connected features address a more capable home-and-range workflow. Treat both figures as manufacturer upper ratings.
What matters in practice
Five feet behind plus ten feet ahead yields fifteen feet, with swing and net safety still outside that sum.
5 + 10 = 15 feet. The front segment is the manufacturer's recommended layout.
Twenty hours is twice SC4 Pro's ten-hour claim. The difference matters for long range days, not simulator compatibility.
20 ÷ 10 = 2.0. These are manufacturer upper ratings under their own conditions.
Twelve hours is two beyond SC4 Pro's rating and eight below SC300i's, assuming no charging between sessions.
3 × 4 = 12 hours. 12 - 10 = 2. 20 - 12 = 8. Idle time and aging can change actual endurance.

Voice Caddie, SC4 Pro
A Doppler-radar monitor with a built-in numeric display, range practice and compatible simulator support. Its recommended indoor setup uses 5 feet behind the ball and 10 feet of flight.

Voice Caddie, SC300i
The tracking system is Doppler radar. The documented use covers indoor and outdoor practice.
Meaningful differences
| What changes | Voice Caddie SC4 Pro | Voice Caddie SC300i | Why it matters |
|---|---|---|---|
| Position behind the ball | 5 feet | 5 feet | The shared rear distance does not establish identical front clearance. |
| Indoor setup guidance | Recommended 10 feet of ball flight, 15 feet sensor to net | Use the current SC300i setup guide for the intended practice mode | Do not infer a simulator room specification from rear placement alone. |
| Simulator support | Supported E6 path and current app features | No comparable simulator path documented in the checked record | Choose the software workflow before comparing course names. |
| Technology | Doppler radar | Doppler radar | No unsupported Three-Doppler hardware-count claim is used. |
| Rated battery | 10 hours | 20 hours | SC300i publishes the longer unplugged rating. |
What you give up
Recommendation switch
Choose Voice Caddie SC4 Pro. SC4 Pro's setup guidance uses five feet behind the ball and a recommended ten feet to the net. SC300i also sits five feet behind the ball, but that does not establish an identical indoor simulator path or front-flight requirement.
Choose Voice Caddie SC300i. SC4 Pro supports simulator software and adds spin and direction feedback. Both use Doppler radar, so the older Three-Doppler wording should not be read as a verified count of radar units. The selected metrics and software support are the useful distinctions.
What matters in practice
SC4 Pro's setup guidance uses five feet behind the ball and a recommended ten feet to the net. SC300i also sits five feet behind the ball, but that does not establish an identical indoor simulator path or front-flight requirement.
SC4 Pro supports simulator software and adds spin and direction feedback. Both use Doppler radar, so the older Three-Doppler wording should not be read as a verified count of radar units. The selected metrics and software support are the useful distinctions.
SC4 Pro lists ten hours and SC300i up to twenty. SC300i suits a long standalone range day, while SC4 Pro's display and connected features address a more capable home-and-range workflow. Treat both figures as manufacturer upper ratings.
What the facts say
Useful conclusions from the current golf launch monitors comparison, followed by the checked facts used to reach them.
Only 6 of 20 models checked match every need here: “Practice at the driving range”, “Build an indoor simulator”, and “Avoid buying a gaming PC”.
6 matching models from 20 checkedMatch countThe count uses the current product-to-need assignments for “Practice at the driving range”, “Build an indoor simulator”, and “Avoid buying a gaming PC”. A need with no documented match does not count.
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| Voice Caddie SC4 Pro |
|
| |
| Voice Caddie SC300i |
|
|
Ready to choose?
Open either model on Amazon to check the current price, customer reviews and delivery options.

You want simulator play and spin feedback
See price & reviews on Amazon
You want longer unplugged range sessions
See price & reviews on AmazonLinks open in a new tab.