Pros
- Three adjustable voltage levels for flavor vs clouds
- Includes ceramic and quartz coils
- Replaceable 600mAh battery with USB-C
- Inhale-activated, compact design
Cons
- Concentrate-only device
- Some users report coil failures
Boundless Terp Pen Spectrum — Price Comparison (3 shops) 21.74 €–67.10 €
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Last updated: 23/09/2026, 1:52 PM
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Specifications
| Specifications | |
|---|---|
| Device Type | Pen |
| Brand | Boundless |
| Power Source | Battery |
| Battery Capacity | 600 mAh |
| Weight | 116 g |
| Dimensions | 15.05 x 1.55 x 1.55 cm |
| Fast Charging | full in ~45 min |
| Session Mode | On-Demand |
| Temperature Control | Presets |
| Material | Concentrates |
| Vapor Path | Quartz |
| Battery Type | Proprietary |
| Replaceable Battery | Yes |
| Charging Port | usb-c |
| Voltage Range | 3.3V - 4.0V |
| Voltage Presets | 3 |
| Atomizer Type | Ceramic |
| Coil Material | Ceramic |
| Thread Type | 510 |
| Auto-Draw | Yes |
| MSRP | $44.95 |
Source: OfficialOfficial, OfficialOfficial, OfficialOfficial, Element VapeRetailer · Verified 19.02.2026
About this vaporizer
The Boundless Terp Pen Spectrum is an inhale-activated concentrate pen with three voltage levels, replaceable ceramic and quartz coils, and a replaceable 600 mAh battery module. USB-C, a 14 mm mouthpiece and a quartz storage compartment complete the feature set. Our price comparison lists it at {shop_count} shops from 49.98 € incl. shipping.
Inhaling activates the coil. The three voltage levels are 3.3, 3.7 and 4.0 V; heating stops after a twelve-second continuous draw. Boundless recommends a five-to-eight-second preheat before touching concentrate, but publishes neither a fixed time to operating temperature, a Celsius range nor a conduction/convection classification.
The replaceable 600 mAh battery module charges by USB-C. Boundless specifies approximately 40 to 50 draws and about 45 minutes to charge. The current manufacturer page does not document use while charging.
The Spectrum is intended for solid concentrates. Documented features include inhale activation, three voltage levels, replaceable coils, a replaceable battery module and use with suitable 14 mm water pipes.
- Three adjustable voltage levels for flavor vs clouds
- Includes ceramic and quartz coils
- Replaceable 600mAh battery with USB-C
- Inhale-activated, compact design
- Concentrate-only device
- Some users report coil failures
Our price comparison lists it at 2 shops from 49.98 € incl. shipping.
How Does the Heating and Temperature Control Work?
Inhaling activates the coil. The three voltage levels are 3.3, 3.7 and 4.0 V; heating stops after a twelve-second continuous draw. Boundless recommends a five-to-eight-second preheat before touching concentrate, but publishes neither a fixed time to operating temperature, a Celsius range nor a conduction/convection classification.
How Do I Charge the Battery Properly?
The replaceable 600 mAh battery module charges by USB-C. Boundless specifies approximately 40 to 50 draws and about 45 minutes to charge. The current manufacturer page does not document use while charging.
How Portable and Ergonomic Is the Design?
The Terp Pen Spectrum is a portable vaporizer. It weighs 116 g — one of the lighter devices in its class.
What Accessories Are Compatible?
Accessories and spare parts are available directly through Boundless.
Verdict
The Spectrum is intended for solid concentrates. Documented features include inhale activation, three voltage levels, replaceable coils, a replaceable battery module and use with suitable 14 mm water pipes.
Spectrum Draw Technique
The Terp Pen Spectrum is draw-activated — simply hold it against the concentrate and inhale. No button needed. The ceramic coil heats up during inhalation and vaporizes the concentrate directly on the surface. Short, gentle draws deliver the best flavour. Drawing for too long overheats the coil. After 3-4 draws, set it down briefly and let it cool.
Spectrum Coil Care
The ceramic coil is the core of the Terp Pen Spectrum. After each session, dab the tip with a dry cotton bud. If the flavour starts to fade, soak the coil in isopropyl alcohol for 15 minutes. Replacement coils should always be close to hand — changing one takes seconds. Most users get 3-4 weeks out of one coil, depending on frequency of use.
Spectrum Battery Tips
The complete 600 mAh battery module is sold as a replacement part. It uses USB-C and its LED indicates charging: red while charging and green when full.
Spectrum vs. Terp Pen
The Terp Pen Spectrum is the further development of the Norddampf Terp Pen. Main differences: three voltage levels instead of one fixed power output, a larger 600-mAh battery and USB-C instead of Micro-USB. Flavour and handling are comparable. Anyone who already owns a Terp Pen and is satisfied with the performance does not necessarily need to upgrade. New buyers are advised to go straight for the Spectrum.
Spectrum Voltage Levels
The Terp Pen Spectrum offers three voltage levels for different concentrate types. Level 1 (low) is suitable for terpene-rich live resin extracts with maximum flavour. Level 2 (medium) is the all-rounder for common waxes. Level 3 (high) reliably vaporizes viscous distillates. Wait briefly between levels so the coil can reach the new temperature.
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Spec comparison
| Terp Pen Spectrum | CFX | |
|---|---|---|
| Type | Vape Pen | Portable |
| Heating | N/A | Hybrid |
| Temperature | N/A | 38°C - 221°C |
| Heat-up time | N/A | 20s |
| Battery | 600 mAh | 5000 mAh |
| Price from | 42.72€ · incl. shipping | 117.35€ · incl. shipping |
| Terp Pen Spectrum | CFX Plus | |
|---|---|---|
| Type | Vape Pen | Portable |
| Heating | N/A | Hybrid |
| Temperature | N/A | 121°C - 221°C |
| Heat-up time | N/A | N/A |
| Battery | 600 mAh | N/A |
| Price from | 42.72€ · incl. shipping | 110.83€ · incl. shipping |
Compatible Accessories
Replacement Parts
1
Other Accessories
1
An inhale-activated concentrate pen from Boundless with three voltage levels, ceramic and quartz coils, and a replaceable 600 mAh battery module.
Boundless describes a coil activated by inhalation but does not classify the system as conduction, convection or hybrid.
Boundless recommends a five-to-eight-second preheat; heating stops after a twelve-second continuous draw. It gives no fixed time to operating temperature.
Yes. The complete 600 mAh battery module is removable and sold by Boundless as a replacement part.
No, the Terp Pen Spectrum is not designed for dosing capsules.
The current product page does not publish a specific warranty term.
Our price comparison shows current prices from various online shops.
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