EARTEC UL3S Ultralite-HD 3-Person Full Duplex Wireless Intercom

In this review of the EARTEC UL3S Ultralite-HD system, the bottom line is simple: it is for small production crews and teams that need reliable, hands-free voice communication with excellent clarity. The package includes one main single-ear headset, two remote single-ear headsets, three rechargeable lithium batteries, a 10-bay multi-port charger and a softside carry case, which together make setup and daily transport straightforward. The single biggest reason to buy is the combination of full duplex operation and strong noise-cancelling voice clarity, which keeps conversations natural and intelligible even in noisy environments.

Key Features

• Complete 3-person kit: Comes with 1 ULSM main headset and 2 ULSR remotes plus batteries and a dedicated 10-bay charger for ready-to-go use by a small team.
• Hands-free full duplex: Operates on 1.9 GHz for simultaneous two-way conversation among users without push-to-talk delays.
• Expandable system: Factory system supports three users out of the box but can be expanded to up to five users when needed for larger crews.
• Good wireless range: Up to 1,000 ft line-of-sight range keeps crew members connected across stages, sets, or job sites within that span.
• Noise-cancelling mic: The microphone filters ambient noise and mutes when pivoted up, maintaining clear communication in loud environments.
• Portable charging and case: The included multi-port charger and softside carrying case simplify battery management and transport between locations.

Who It's For

The UL3S is well suited to video and stage production crews, small event teams, drone operators, boat operators and light construction or UTV teams who need dependable, real-time voice coordination across short to medium distances. The single-ear design preserves environmental awareness while providing clear two-way audio for a three-person team.

Those who should look elsewhere include teams that need more than five simultaneous users, or groups that require over 6 hours of continuous talk time per battery without swapping or external power solutions. If ultra-long battery runtime or integrated multi-channel radio features are required, a different system would be a better fit.

Pros & Cons

Pros

• Clear, professional-quality voice communication aided by a noise-cancelling microphone for intelligible talk in noisy settings.
• Full duplex operation on 1.9 GHz enables natural, hands-free conversations without push-to-talk delays.
• Complete kit with charger and case simplifies logistics and keeps batteries organized for regular use.
• Respectable line-of-sight range of up to 1,000 ft for most small venue and outdoor needs.

Cons

• Battery life is around 6 hours per charge and some users report mixed longevity, so teams may need extra batteries for long days.
• System supports up to five users maximum, which may be limiting for larger crews.

Specifications

Included headsets	1 ULSM main, 2 ULSR remote single-ear headsets
Batteries	3 rechargeable lithium batteries
Charger	10-bay multi-port charger
Wireless band	1.9 GHz full duplex
Range	Up to 1,000 ft line-of-sight
Talk time	Up to 6 hours per charge
Expandability	Expandable to up to 5 users

Our Verdict

The EARTEC UL3S Ultralite-HD is a practical, value-oriented intercom solution for small teams who prioritize clear, hands-free conversation and simple battery management. It pairs strong noise-cancelling clarity and full duplex operation with a thoughtful kit that includes a 10-bay charger and carrying case, making it a solid choice for productions and field teams that operate within its user and battery-runtime limits.

Frequently Asked Questions

How many users does the system support out of the box?
The boxed system supports 3 users and is expandable to up to 5 users.

What is the expected battery life per charge?
Batteries provide up to about 6 hours of talk time on a single charge, though some users report variable longevity depending on usage.

Can these headsets be used in noisy environments?
Yes, the noise-cancelling microphone improves voice clarity in high-noise settings and the mic mutes automatically when pivoted up.