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Energy Sistem OpenWave specifications and in-depth review

Energy Sistem OpenWave

Manufacturer: Energy Sistem

The Energy Sistem OpenWave are true wireless open-ear earbuds designed for users who prefer an open-ear fit with no cables or neckband. They come with wingtips for added stability and include stereo speakers, making them a straightforward option for everyday wireless listening. A travel bag is included in the box, and the earbuds support voice prompts along with a control panel placed directly on the device.

On the technical side, the OpenWave carry an IPX5 sweat-resistance rating and connect via Bluetooth 5.3 with a maximum range of 10 meters. The battery delivers 8 hours of playback per charge, with the charging case extending total usage to 17 hours; a full charge takes 1.5 hours, and fast charging is supported. Charging is handled through USB Type-C. The frequency response spans 20 Hz to 20,000 Hz, and a noise-canceling microphone is built in, allowing the earbuds to function as a headset with a mute function available during calls.

Pros
  • Open-ear fit allows users to remain aware of their surroundings during use
  • True wireless design with no cables or neckband keeps the setup uncluttered
  • Wingtips are included for a more secure fit during physical activity
  • IPX5 rating provides reliable sweat resistance for active use
  • The charging case extends total battery life to 25 hours, reducing how often the case itself needs recharging
  • Fast charging is supported, minimizing downtime when the battery is low
Cons
  • No active noise cancellation or passive noise isolation, so audio can be easily disrupted in noisy environments
  • Maximum Bluetooth range is limited to 10 meters
  • No advanced audio codecs such as AAC, aptX, or LDAC are supported
  • Wireless charging is not available; the case must be charged via cable
  • No fast pairing or NFC pairing support, which can slow down the initial connection process
  • There is no find device feature, making it harder to locate misplaced earbuds
Who is this for?

The OpenWave are well suited to users who prioritize situational awareness during outdoor or light physical activity, since the open-ear design allows ambient sound to pass through freely. The IPX5 sweat resistance and included wingtips make them a practical choice for workouts and on-the-go use where a secure, cable-free fit is needed. Users who frequently take calls will also benefit from the noise-canceling microphone, mute function, and voice prompts, making these earbuds a reasonable fit for casual hands-free communication throughout the day.

Who is this NOT for?

Users looking for an immersive listening experience will find these earbuds lacking, as the open-ear fit combined with the absence of both active noise cancellation and passive noise isolation means audio quality is easily affected by surrounding noise. Audiophiles or those who rely on high-fidelity wireless audio will be disappointed by the lack of advanced codecs such as LDAC, aptX, or AAC. Additionally, users who need extended wireless reach or seamless quick pairing will find the 10-meter Bluetooth range and the absence of fast pairing and NFC support limiting in more demanding connectivity scenarios.

Design:

Fit Open-ear
Ingress Protection (IP) rating IPX5
water resistance Sweat resistant
has no wires or cables ✓
are neckband earbuds ✕
wingtips included ✓
has stereo speakers ✓

The Energy Sistem OpenWave feature an open-ear fit and are fully wireless, with no cables or neckband involved. Wingtips are included to help keep the earbuds in place during use. They carry an IPX5 ingress protection rating, making them sweat resistant — suitable for active use. Stereo speakers are built in, and the overall form factor is a compact, wire-free design without a neckband.

Sound quality:

has active noise cancellation (ANC) ✕
has passive noise reduction ✕
lowest frequency 20 Hz
highest frequency 20000 Hz
has a neodymium magnet ✕

The OpenWave cover a frequency range of 20 Hz to 20,000 Hz, spanning the full standard range of human hearing. The earbuds do not include active noise cancellation (ANC) or passive noise reduction, meaning environmental sound passes through freely — which aligns with their open-ear design. There is no neodymium magnet in the driver configuration.

Power:

Battery life 8 hours
Battery life of charging case 17 hours
charge time 1.5 hours
has wireless charging ✕
has a battery level indicator ✓
has a rechargeable battery ✓

The OpenWave are equipped with a rechargeable battery that provides 8 hours of playback per charge, with the charging case contributing an additional 17 hours for a combined total of 25 hours. A full charge takes 1.5 hours, and a battery level indicator is included so users can monitor remaining power. Wireless charging is not supported.

Connectivity:

has fast pairing ✕
Has USB Type-C ✓
Bluetooth version 5.3
has LDAC ✕
has LDHC ✕
has aptX Adaptive ✕
has aptX Low Latency ✕
has aptX HD ✕
has aptX ✕
has aptX Lossless ✕
has aptX Voice ✕
maximum Bluetooth range 10 m
supports Bluetooth pairing using NFC ✕
Can be used wirelessly ✓
has AAC ✕

The OpenWave connect wirelessly via Bluetooth 5.3 with a maximum range of 10 meters, and use USB Type-C for wired charging. Neither fast pairing nor NFC pairing is supported. On the codec side, the earbuds do not include AAC, LDAC, LDHC, aptX, aptX HD, aptX Adaptive, aptX Low Latency, aptX Lossless, or aptX Voice, meaning audio is transmitted using the standard SBC codec by default.

Features:

has ambient sound mode ✕
has in/on-ear detection ✕
has find device feature ✕
Supports fast charging ✓
has a mute function ✓
can be used as a headset ✓
control panel placed on a device ✓
Has voice prompts ✓
travel bag is included ✓
Has an in-line control panel ✕
Has a temperature sensor ✕

The OpenWave support fast charging and can be used as a headset, with a mute function available during calls. Controls are handled via a panel placed on the earbuds themselves — there is no in-line control panel on a cable. Voice prompts are included to assist with device feedback, and a travel bag comes in the box. The earbuds do not feature ambient sound mode, in/on-ear detection for auto-pause, a find device function, or a body temperature sensor.

Microphone:

has a noise-canceling microphone ✓

The OpenWave include a noise-canceling microphone, which helps reduce unwanted background sound when taking calls or using the earbuds as a headset.

Final Verdict

The Energy Sistem OpenWave carve out a clear niche as open-ear true wireless earbuds built around everyday mobility and situational awareness. Their IPX5-rated sweat resistance combined with a cable-free, wingtip-secured design makes them a practical companion for active users who need to stay tuned in to their environment without being tethered by wires. The 25-hour combined battery life and fast charging support add genuine convenience to daily use, while the noise-canceling microphone rounds out a functional headset experience. That said, the absence of noise isolation, advanced audio codecs, and smart features like auto-pause or device finding means they are not positioned for users with more demanding audio or connectivity expectations. Overall, the OpenWave are a straightforward, well-equipped option for users who value an open, lightweight wireless experience over acoustic performance or feature depth.

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