Is this an mmxc connection?

Yes, the cables are attached with a micro-miniature coaxial (MMXC) connector. It does have a tab to prevent them from spinning however, so I'm not sure if it would work with standard MMXC connectors.

what kind of eartips can I purchase that would fit these?

If you have larger ear canals, as I do, the triple-flange ear tips (which offer the best sound isolation) provided by Etymotic are too small. Google search for "6pcs (M-LB) Triple Flange Replacement Ear tips Earbuds for Etymotic Earphones." These are absolutely the best for larger ear canals.

can a call be muted by a button

This particular in-ear headphone does not have a mic or volume/mute buttons.

How do these compare to shure se215 afa protrusion and noise isolation? usage is riding a motorcycle. thanks

I don't know anything about the Shures, but these are the only earphones I've found to work with mc riding.

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Etymotic Research ER2SE Studio Edition High Performance In-Ear Earphones (Detachable Dynamic Drivers, Noise Isolating, High Accuracy, Studio Grade Accuracy), Wireless, one size

Product ID: 256211091

Details

Brand
Etymotic
Colour
Multicolored
Ear placement
In Ear
Form factor
In Ear
Impedance
15 Ohms

🎧Dynamic drivers for studio-grade sound

🔄Detachable cable for effortless replacement

🔇35+ dB noise isolation blocks distractions

Description

🎶 Hear every detail, miss nothing — your studio-grade sound sanctuary.

CUSTOM FIT COMFORT - Choose from a variety of ear tips ensuring a perfect, secure in-ear fit for all-day wear.
PRECISION STUDIO SOUND - Experience crystal-clear, flat frequency response tailored for audiophiles and pros alike.
DURABLE STYLISH BUILD - Metal anodized earpieces combine sleek aesthetics with long-lasting resilience.
FUTURE PROOF CONNECTIVITY - Wireless convenience paired with a detachable cable for ultimate flexibility and easy upgrades.
UNMATCHED NOISE ISOLATION - Block out over 35 dB of ambient noise and dive deep into your mix without cranking volume.

The Etymotic Research ER2SE Studio Edition In-Ear Earphones deliver high-accuracy sound with dynamic drivers and over 35 dB noise isolation. Featuring a metal anodized finish and a detachable cable, these wireless earphones offer customizable comfort with multiple ear tips, making them ideal for professionals and audiophiles seeking precise, immersive audio on the go.

Specifications

ASIN	B07NSQBK1X
Additional Features	Lightweight
Age Range Description	Adult
Antenna Location	Music, Recording
Audio Driver Type	Dynamic Driver
Best Sellers Rank	#83,946 in Electronics ( See Top 100 in Electronics ) #3,753 in In-Ear Headphones
Brand	Etymotic Research
Built-In Media	Detachable cable, Assortment of ear tips
Cable Features	Detachable
Carrying Case Color	Dark Blue or Black
Carrying Case Material	Plastic or Metal
Color	Multicolored
Compatible Devices	Any device with 3.
Connectivity Technology	Wireless
Control Method	Touch
Control Type	Volume Control
Controller Type	Software
Customer Package Type	standard packaging
Customer Reviews	4.1 4.1 out of 5 stars (332)
Earpiece Shape	Rounded Tips
Enclosure Material	Metal
Frequency Range	20 Hz – 16 kHz
Global Trade Identification Number	00846430002197
Headphone Folding Features	In Ear
Headphone Jack	3.5 mm Jack
Headphones Ear Placement	In Ear
Impedance	15 Ohms
Is Autographed	No
Is Electric	No
Item Type Name	Etymotic Research ER2SE Studio Edition In-Ear Earphones
Item Weight	0.19 Kilograms
Manufacturer	Etymotic Research
Model Name	ETYER2SE
Model Number	ER2SE
Noise Control	Sound Isolation
Number of Items	1
Sensitivity	35 dB
Specific Uses For Product	Communication
Style Name	Modern
Subject Character	no character
Theme	No theme
UPC	846430002197
Water Resistance Level	Not Water Resistant
Wireless Technology	Wireless

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