Fosi Audio IM4 Offener In-Ear Monitor
Features
- No Battery. No Bluetooth. Just Plug In.
- Spacious, Natural Sound. Low Distortion.
- 5g Resin Housing. All-Day Comfort.
- One Cable. Gaming, Calls, Music — All in One.
PLUG & PLAY — ZERO LATENCY: No battery, no Bluetooth, no setup. Just plug the 3.5mm jack into your device and enjoy instant, stable, low-latency audio. A USB-C DAC adapter is included for devices without a headphone jack, supporting up to 384kHz/32bit high-resolution playback.
OPEN-BACK HI-FI SOUND: A 10mm N52 dual-magnet dual-cavity dynamic driver paired with an aluminum-magnesium alloy diaphragm and open-back design delivers a spacious, natural soundstage with low distortion, clear highs, and full-bodied lows — engineered for gaming, music, and monitoring.
ALL-DAY COMFORT: Built with 3D ear-canal scan data, the 5g medical-grade resin housing features a honeycomb structure that is 30%+ lighter than conventional designs. The skin-friendly fit provides 20dB+ passive noise isolation, ensuring pressure-free comfort for hours of listening.
BUILT-IN MIC & FULL INLINE CONTROLS: One cable handles everything — track switching, volume up/down, play/pause, answer/end calls, and a physical mic mute switch. Ideal for gaming, online meetings, voice calls, and music monitoring without touching your device.
ULTRA-LIGHTWEIGHT & VERSATILE: At just 4.3g per earbud (29.8g with cable), the IM3 is ready for any scene — competitive gaming, immersive music listening, focused work calls, or creative monitoring. The detachable 2-pin 0.78 mm cable design allows easy upgrade or replacement.
2-Years Official Warranty
Fosi Audio Devices Are Covered For A Period Of 2 Years.
Fast,Free Delivery
Free Shipping In 3-10 business days On Orders.
Global support
Our support team can help with product setup, order questions, and after-sales service.
No Battery. No Bluetooth. Just Plug In.
Always-on wired connection for stable, low-latency listening.3.5mm Input · USB-C DAC Included
One Cable. Everything You Do.
Built for gaming, music, meetings, learning and monitoring.
HIGH-RES SOUND. TRUE TO DETAIL.
Low Distortion · Clear Highs · Full-Bodied Lows
Comfort Comes Naturally
Lightweight Design · Resin Material · Skin-Friendly Fit
Product Specification
Shell Material 3D-Printed Resin Front Chamber + CNC-Machined Aluminum Alloy Rear Cover
Driver Unit 10mm N52 Dual-Magnet Dual-Cavity Dynamic Driver
Diaphragm Aluminum-Magnesium Alloy Diaphragm
Frequency Response 20Hz - 20kHz
Impedance 32Ω
Sensitivity 107dB
Cable 5N Oxygen-Free Copper Cable
Connector 2-pin 0.78 mm (Detachable)
Audio Jack 3.5mm Gold-Plated Plug
USB-C DAC Included (Sampling Rate: 384kHz/32bit, ADC: 48kHz/24bit)
Weight (per earbud) 4.3g ± 0.5g
Weight (incl. cable) 29.8g ± 1g
What's in the Box?
①IM3 Earphones
②Detachable+Mic Cable With Inline Controls
③USB-C-AUF-3.5MM-Kabel
④Balanced Ear Tips
⑤Bass Ear Tips
⑥Earphone Pouch
⑦User Manual&Quick Guide
FAQs
What are the benefits of an open-back design, and how does the IM3 work?
The open-back design helps create a more spacious, natural listening experience, making music feel less confined. Its wired connection provides direct audio playback without requiring Bluetooth pairing or charging the earbuds.
Are the Fosi Audio IM3 earbuds good for gaming?
Yes. The Fosi Audio IM3 is suitable for gaming on compatible devices, offering a wired listening experience for a wide range of games, from immersive single-player adventures to fast-paced multiplayer matches.
What devices are compatible with the Fosi Audio IM3?
The Fosi Audio IM3 is compatible with PCs, laptops, smartphones, and other devices with a 3.5mm headphone jack. For compatible devices without a 3.5mm headphone jack, the included USB-C adapter provides a convenient connection option.
Does the IM3 have a microphone?
Yes, the IM3 features an inline microphone with a physical mute switch, making it ideal for gaming, calls, and online meetings.
Do I need to charge the IM3 earbuds?
No. The IM3 is a wired in-ear monitor that does not require charging. Simply plug it into your device and enjoy zero-latency audio.
What is the weight of the IM3?
Each earbud weighs approximately 4.3g (±0.5g), and the total weight, including the cable, is 29.8g (±1g), making it extremely lightweight for all-day comfort.
Are the cables detachable?
Yes, the IM3 uses a 2-pin 0.78 mm detachable cable design, allowing you to replace or upgrade the cable as needed.
Does the IM3 support a USB-C connection?
Yes, the IM3 includes a USB-C to 3.5mm DAC adapter with 384kHz/32bit sampling rate and 48kHz/24bit ADC, providing high-resolution audio for USB-C devices.