USAMS Echo E03 AAC TWS Semi In-Ear Earbuds – 4H Playtime, 250mAh Case, 16H Total

The USAMS Echo E03 are TWS semi in-ear earbuds in ABS+PC. Bluetooth version: 5.3 (per source bullet points; not confirmed in source spec table). Codec: AAC. Driver specification: not listed in source. Each earbud: approximately 3.1g. Battery per earbud: 25mAh. Playback time: approximately 4 hours. Call time: approximately 3 hours. Earbud charge time from case: approximately 1 hour. Case battery: 250mAh. Case charge time: approximately 2 hours via included Type-C cable. Case size: 53.92×47.96×24.66mm. Total comprehensive battery: approximately 16 hours. Touch controls on each earbud. Colour: not specified in source spec table. Package: earbuds, charging case, Type-C cable, and English user manual. No certifications listed. Curated by Aetheo.

Why you'll like it

• AAC codec — Advanced Audio Coding for compatible Bluetooth source devices
• 4 hours of wireless playback per earbud charge — approximately 16 hours total with case
• 250mAh charging case — compact at 53.92×47.96×24.66mm
• Touch controls — on-earbud touch input for playback and calls
• Type-C charging cable included — ready to use out of the box

Designed for compact wireless TWS listening

The Echo E03 connects wirelessly via Bluetooth (5.3 per source bullet points; not confirmed in the source specification table) to paired smartphones, tablets, and other Bluetooth-enabled devices. AAC codec support enables higher-quality audio transmission on compatible Apple and Android devices when the source device also outputs AAC over Bluetooth. Driver specification is not listed in source documentation. Each earbud weighs approximately 3.1g (per source bullet points) and has a 25mAh battery providing approximately 4 hours of playback or approximately 3 hours of call time. The 250mAh charging case recharges the earbuds in approximately 1 hour; the case charges via the included Type-C cable in approximately 2 hours — source describes total comprehensive battery as approximately 16 hours. Touch controls on each earbud manage playback and call functions. The semi in-ear design rests at the ear opening without deep in-canal insertion. No certifications are listed in source. Curated by Aetheo.

Key features

AAC codec — Bluetooth wireless audio

The Echo E03 supports AAC (Advanced Audio Coding) codec for Bluetooth audio transmission. AAC provides higher data rates than the baseline SBC codec and is widely supported on Apple iOS devices and many Android devices. AAC is a lossy compression format — audio is encoded at a reduced bitrate during Bluetooth transmission. Codec support beyond AAC (aptX, aptX HD, LDAC) is not listed in source documentation. Bluetooth version 5.3 is listed in the source product bullet points and is not confirmed in the source spec table — both are noted in this listing. Actual codec and connection quality depend on what both the earbud and source device negotiate at connection time.

25mAh earbud battery — approximately 4H playback — touch controls

Each earbud has a 25mAh battery providing approximately 4 hours of wireless playback or approximately 3 hours of call time. The earbuds recharge from the case in approximately 1 hour. Touch controls on each earbud allow on-ear input for playback control, volume adjustment, and call management — specific touch gesture mapping is not listed in source documentation. Each earbud weighs approximately 3.1g per source bullet points. The semi in-ear design does not use eartips that create a sealed in-canal fit — ambient sound enters around the earbud shell.

250mAh charging case — Type-C cable included — 53.92×47.96×24.66mm

The 250mAh charging case recharges the earbuds in approximately 1 hour per charge cycle. The case charges via the included Type-C cable in approximately 2 hours. Total combined playtime across earbuds and case charges is described as approximately 16 hours in source documentation. The case measures 53.92×47.96×24.66mm. Case weight is not specified in source. The Type-C charging cable is included in the package — the cable length is not specified in source. No adaptor or wall charger is included.

Best for

• AAC wireless audio — compatible with iOS and Android devices supporting AAC Bluetooth output
• Compact TWS earbuds — approximately 3.1g per earbud, semi in-ear design
• 4 hours per charge — approximately 16 hours total with case
• Touch control earbuds — on-ear input for playback and calls
• Type-C charging — cable included in the package

What's included

• 2 × USAMS Echo E03 Earbuds (left and right)
• 1 × Charging Case (250mAh)
• 1 × Type-C Charging Cable
• 1 × English User Manual

Compatibility and setup

Material: ABS + PC. Bluetooth: 5.3 (per source bullet points; not confirmed in source spec table). Codec: AAC.