Price (USD)
Boundless Terp Pen edgeBoundless Terp Pen
$25
Zeus Arc GT4
$260
Boundless Terp Pen is typically around $235 lower.
Vaporizer Comparison
Boundless Terp Pen vs Zeus Arc GT4
Side-by-side specs, pricing context, and clear decision guidance.
Boundless Terp Pen
Boundless Technology from $25.49
VS
Zeus Arc GT4
Zeus Arsenal $260
Editorial Summary
Boundless Terp Pen and Zeus Arc GT4 are both concentrates / portable vaporizers, but they target different priorities. Boundless Terp Pen is usually the lower-cost pick at $25, around $235 below Zeus Arc GT4. Session style, airflow, and extraction behavior will matter more than raw spec sheet numbers here.
Specs Compared
26
Different Specs
24
Shared Specs
2
Overall Overlap
8%
Shared Traits
Concentrates Portable Electronic
Head-to-Head Highlights
A quick snapshot of the specs people usually care about first.
Heating Style
Close callBoundless Terp Pen
Ceramic & Stainless Steel Coil
Zeus Arc GT4
Conduction
Heating style differs, which can impact flavor and extraction behavior.
Key Differences at a Glance
Top specs where these two devices diverge.
Price (USD)
Boundless Terp Pen
$25
Zeus Arc GT4
$260
Heating Type
Boundless Terp Pen
Ceramic & Stainless Steel Coil
Zeus Arc GT4
Conduction
Temperature Range
Boundless Terp Pen
N/A
Zeus Arc GT4
195-225°C (383-437°F) herb, 235-255°C (455-491°F) wax
Chamber Capacity
Boundless Terp Pen
N/A
Zeus Arc GT4
Up to ~0.4g in an ArcPod, spacer included for smaller loads
Battery Capacity
Boundless Terp Pen
300mAh
Zeus Arc GT4
3500mAh
Charging
Boundless Terp Pen
Micro USB
Zeus Arc GT4
USB-C (5V, 2.5A, 12.5W)
Dimensions
Boundless Terp Pen
13x134x13mm
Zeus Arc GT4
86.5 x 42.5 x 22.5mm
Power Adjustment
Boundless Terp Pen
Draw-Activated
Zeus Arc GT4
Presets (6 herb levels, 3 wax levels)
Chamber Material
Boundless Terp Pen
Ceramic
Zeus Arc GT4
24K gold coated
Concentrate Support
Boundless Terp Pen
Yes
Zeus Arc GT4
Yes, via the WaxPod and a dedicated wax mode
Choose Boundless Terp Pen if...
- You want the lower listed entry price ($25 vs $260).
- You prefer a ceramic & stainless steel coil heating profile.
- Your usage leans toward pen sessions.
Lowest price
$25.49
at The Stash Shack
Choose Zeus Arc GT4 if...
- You prefer a conduction heating profile.
- Your usage leans toward conduction and discrete sessions.
- You prefer Zeus Arc GT4's overall feature mix and form factor.
Prices are read automatically from retailer pages and were last checked Aug 27, 2026; confirm the price at checkout. Some links are affiliate links, which support Thermal Extractions at no extra cost to you.
Spec Comparison Table
Direct comparison of every spec from each device profile.
24 differ 2 shared
| Specification | Boundless Terp Pen | Zeus Arc GT4 |
|---|---|---|
| Price (USD) | $25 | $260 |
| Device Type | Portable | Portable |
| Heating Type | Ceramic & Stainless Steel Coil | Conduction |
| Heat Up Time | — | ~35 seconds |
| Temperature Range | N/A | 195-225°C (383-437°F) herb, 235-255°C (455-491°F) wax |
| Chamber Capacity | N/A | Up to ~0.4g in an ArcPod, spacer included for smaller loads |
| Battery Type | Internal | Internal |
| Battery Capacity | 300mAh | 3500mAh |
| Battery Life | — | ~6-8 sessions per charge |
| Charging | Micro USB | USB-C (5V, 2.5A, 12.5W) |
| Charge Time | — | ~90 minutes |
| Dimensions | 13x134x13mm | 86.5 x 42.5 x 22.5mm |
| Weight | — | ~121 grams |
| Power Adjustment | Draw-Activated | Presets (6 herb levels, 3 wax levels) |
| Chamber Material | Ceramic | 24K gold coated |
| Concentrate Support | Yes | Yes, via the WaxPod and a dedicated wax mode |
| Brand | Boundless Technology | Zeus Arsenal |
| Adjustable Airflow | — | Yes (Flow Sink in for a restricted draw, out for a free draw) |
| Country of Manufacture | China | — |
| Display Type | — | 3 LED status interface |
| Haptic Feedback | — | Yes |
| Manufacturer | — | Thermodyne Systems |
| Release Date | — | 2025 |
| Session Style | On-Demand | Session (6 minute herb cycle, ~2 minute wax cycle) |
| Warranty | 3 years | 2 years, extendable to 3 with registration (battery 3 months) |
| Water Pipe Adapter | — | Included, fits 14mm and 18mm glass |
Comparison FAQs
What is the biggest difference between the Boundless Terp Pen and the Zeus Arc GT4?
The biggest practical difference is price tier: the Boundless Terp Pen sits at $25 while the Zeus Arc GT4 is $260, a gap of about $235 that puts them in different buying brackets.
Which is cheaper, the Boundless Terp Pen or the Zeus Arc GT4?
Boundless Terp Pen is the cheaper option at $25 compared with $260 for the Zeus Arc GT4, about $235 less. Live retailer pricing can shift, so confirm before buying.
What's the difference in heating between the Boundless Terp Pen and the Zeus Arc GT4?
Boundless Terp Pen uses ceramic & stainless steel coil heating, while the Zeus Arc GT4 uses conduction. Heating style influences flavor profile, vapor density, and how forgiving the device is to draw technique.
Can I set custom temperatures on the Boundless Terp Pen or the Zeus Arc GT4?
Boundless Terp Pen controls heat with draw-activated, while the Zeus Arc GT4 uses presets (6 herb levels, 3 wax levels). Both let you change temperature, just with different levels of precision.
How much flower do the Boundless Terp Pen and Zeus Arc GT4 hold?
Boundless Terp Pen lists a chamber capacity of N/A; the Zeus Arc GT4 lists Up to ~0.4g in an ArcPod, spacer included for smaller loads.
Can I use the Boundless Terp Pen or the Zeus Arc GT4 with a water pipe?
Only the Zeus Arc GT4 has a documented water-pipe adapter option. The Boundless Terp Pen doesn't list one, though aftermarket adapters sometimes exist for popular models.
Can I use concentrates with the Boundless Terp Pen or the Zeus Arc GT4?
Both devices support concentrate use, typically via an included or aftermarket pad or insert. Check the manual for the recommended approach for each.
Need a different matchup?
Jump into the comparison hub to pick any two devices and open a canonical side-by-side page.