what size eartips fit these (nozzle)?

Another very nice set of eartips which fit the Performer 5 nozzles really well are the Azla SednaEarFitLight eartips. The Performer 5's nozzles are 5.8 mm in diameter.

Mine did not come shrink wrapped. Does this mean they were opened prior to me receiving them?

TBH... possibility exists. Thee have been cases where opened items are shrink wrapped again...but typically anything used, renewed, etc has it listed clearly in the title and in the additional remarks about the item, there's usually a statement regarding if the package/box has been opened. They also say if any contents are missing (tools, instructions, etc). If you have serious doubts and it's in the time window for returns, you could send it back for one of the 3R's (refund ,return, or replacement). Good luck & cheers!

What's the audio input size? 3.5mm? Or 4.4mm?

Cable provided in 3.3 mm, but you can use a different cable and get 4.4. or 2.5 if you like.

Can i use these with my phone

Of course. If you have a newer phone you'll need a 3.5mm to type-c adapter. But if your phone has a headphone jack just plug it in.

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HiFiGo AFUL Acoustics Performer 5 Hybrid Drivers in-Ear Monitors, 1DD + 4BA in-Ear Earphones IEMs (AFUL Performer 5)

Product ID: 547207593

Details

Brand
HiFiGo
Colour
AFUL Performer
Ear placement
In Ear
Form factor
In Ear
Impedance
35 Ohms

🎧5-driver hybrid setup

⚙️RLC frequency correction

🛠️3D printed acoustic tubes

Description

🎶 Elevate your audio game with precision-engineered sound perfection!

ERGONOMIC SLEEK DESIGN - Lightweight, sculpted ear shells fit like a glove—style and comfort that keep you plugged in longer.
COMFORT MEETS INNOVATION - High-damping air-pressure balance system reduces ear fatigue and enhances bass texture for all-day wear.
SMART RLC FREQUENCY DIVISION - In-house tech ensures smooth, balanced sound by correcting driver frequency overlaps and peaks.
IMMERSIVE FIVE DRIVER HYBRID SOUND - Experience crystal-clear highs, rich mids, and thunderous bass with a custom 1DD + 4BA driver array.
PRECISION 3 D PRINTED ACOUSTIC TUBES - EnvisionTEC’s ultra-long, ultra-thin bass and mid-bass ducts deliver phase-perfect, slam-packed low end.

The HiFiGo AFUL Acoustics Performer 5 IEMs combine a powerful 5-driver hybrid system (1 dynamic + 4 balanced armatures) with cutting-edge 3D printed acoustic tubes and proprietary RLC frequency correction technology. Designed for audiophiles seeking detailed, balanced sound and all-day comfort, these ergonomically crafted earphones deliver immersive, phase-accurate audio with enhanced bass impact and reduced ear pressure.

Specifications

ASIN	B0BN44FZR2
Additional Features	Hybrid Driver IEMs
Age Range Description	Adult
Antenna Location	High fidelity musical listening
Audio Driver Size	10 Millimeters
Audio Driver Type	Hybrid Driver
Best Sellers Rank	#129,257 in Electronics ( See Top 100 in Electronics ) #5,253 in In-Ear Headphones
Bluetooth support?	Yes
Brand	HiFiGo
Built-In Media	Eartip
Cable Features	Detachable
Carrying Case Color	AFUL Performer 5
Carrying Case Material	[Predicted: Plastic or similar synthetic material]
Carrying Case Weight	2 Ounces
Color	AFUL Performer 5
Compatible Devices	Cell Phones, Tablets, Notebooks, Desktops
Connectivity Technology	Wired
Control Method	Remote
Control Type	Media Control
Controller Type	Wired Controller
Customer Package Type	FFP
Customer Reviews	4.4 4.4 out of 5 stars (130)
Earpiece Shape	Rounded tips
Enclosure Material	Plastic
Frequency Range	20Hz - 20,000Hz
Generation	5 US
Hardware Interface	3.5mm Audio
Headphone Folding Features	In Ear
Headphone Jack	3.5 mm Jack
Headphones Ear Placement	In Ear
Impedance	35 Ohms
Input-Device Interface	Audio Jack
Item Weight	0.35 Kilograms
Manufacturer	HiFiGo
Mfr Part Number	Performer 5
Model Name	Performer 5
Model Number	Performer 5
Noise Control	Sound Isolation
Noise Control Features	passive noise isolation
Number of Items	1
Number of Packs	1
Sensitivity	110 dB
Series Number	5
Style Name	Minimalist
Unit Count	1 Count
Water Resistance Level	Not Water Resistant
Wireless Technology	Bluetooth

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