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Soundcore AeroFit 2 A3874-cr Open-Ear Headphones Black 10h 42h IP55 85g
Open-ear headphones with 20 mm racetrack drivers, 10 hours battery life, 42 hours with case, IP55 rating and AI call microphones
- TypeOn-Ear
- ColorBlack
- Frequency Response5Hz-20KHz
- THDOpen Ear
- Input Impedance16 ohms
- Signal to Noise Ratio(SNR)127.5 decibels
- Open-ear design keeps you aware of surroundings while listening
- 20mm × 11.5mm racetrack drivers deliver rich sound with deep bass
- 10 hours playtime per charge, 42 hours total with case
- IP55 rating resists sweat and rain during workouts
- Four beam-forming mics with AI algorithm ensure clear calls
Open-Ear Headphones for All-Day Awareness
These open-ear headphones use air conduction technology and adjustable ear hooks to sit outside the ear canal. The non-intrusive design lets ambient sound pass through so you stay aware of traffic and conversations. They suit commuters, office workers and outdoor exercisers who need audio without isolation. The 85 gram weight and IP55 rating support extended daily wear.
Sustained Listening with Wireless Top-Ups
A single charge delivers 10 hours of continuous playback for a full workday or long training session. The charging case extends total operating time to 42 hours without a cable. The case supports wireless charging for convenient top-ups on any Qi pad. One hour of charging restores the buds so downtime stays minimal during heavy use.
20mm × 11.5mm Racetrack Drivers with BassTurbo
The 20mm by 11.5mm racetrack drivers and BassTurbo tuning produce deeper bass and clearer treble than typical open-ear designs. LDAC codec support preserves detail over Bluetooth. Buyers who need active noise cancellation or sealed bass response should choose a different form factor.
Highlights
- Open-ear design keeps you aware of surroundings while listening
- 20mm × 11.5mm racetrack drivers deliver rich sound with deep bass
- 10 hours playtime per charge, 42 hours total with case
- IP55 rating resists sweat and rain during workouts
- Four beam-forming mics with AI algorithm ensure clear calls
Specifications
| Brand | Soundcore |
|---|---|
| Model | A3874, A3874-cr |
| Part Number | A3874-cr |
| Type | On-Ear |
| Color | Black |
| Frequency Response | 5Hz-20KHz |
| THD | Open Ear |
| Input Impedance | 16 ohms |
| Signal to Noise Ratio(SNR) | 127.5 decibels |
| Power Supply | cell, lithium_polymer, p76, true |
| Sensitivity | 127.5 decibels |
| Connector | No Jack |
| Ear Coupling | open_ear |
| Weight | 85 grams |
| Noise Cancelling | none |
| Wireless Type | Bluetooth |
| Battery | 10 hours |
| Operating Time | 10 hours |
| Charge Time | 1 hours |
| Contains Embedded Battery | cell |
| Microphone Impedance | 16 ohm |
| Microphone Frequency Response | 20Hz-20KHz |
| Microphone Signal to Noise Ratio(SNR) | 127.5 decibels |
| Microphone Sensitivity | 127.5 decibels |
| Features | none, 5.4, 10 hours, Touch Control, touch, Wireless, Open Ear, dynamic_driver, 16 ohm |
Questions about this item
How much heat or noise do the AeroFit 2 A3874-cr produce during all-day wear?
The open-ear design uses air conduction with no drivers inside the canal, so there is no trapped heat and zero fan noise; at 85 g they stay comfortable for the full 10-hour single-charge span.
What must I already own to use the AeroFit 2 A3874-cr?
A Bluetooth audio source such as a phone, tablet or laptop — no jack or proprietary dongle is required because the headphones connect wirelessly only.
Can I pair the AeroFit 2 A3874-cr with an older phone that only supports basic Bluetooth audio?
Yes — the headphones use standard Bluetooth streaming, so any device that can send A2DP audio will play music and take calls through the 20 × 11.5 mm racetrack drivers.
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