# item.guide
Side-by-Side Comparison Jack Connectors

2.5mm TRS vs. 3.5 mm TRRS

Comparing 2 standards across 8 specifications. 8 key differences identified.

Comparing:
2.5mm TRS
3.5 mm TRRS
2.5mm TRS →

2.5mm TRS is the smallest common member of the phone-connector family -- the same tip-ring-sleeve wiring as 3.5mm TRS, scaled down to a 2.5mm shaft. It was used for headset jacks on cordless phones, two-way radios, and early portable tape recorder remotes before 3.5mm became the standard smaller size.

View full 2.5mm TRS spec sheet →
3.5 mm TRRS →

3.5mm TRRS connectors transmit stereo audio plus a microphone signal over four conductors. CTIA wiring places ground on Ring 2 and mic on the sleeve; OMTP swaps ground to the sleeve and mic to Ring 2, causing muted or distorted audio when the two are mixed.

View full 3.5 mm TRRS spec sheet →

Specification Comparison Table

8 Parameters
Parameter / Spec
2.5mm TRS
3.5 mm TRRS
Connector Family
Phone Jack (Micro-Mini) Phone Jack (Mini-Jack)
Shaft / Plug Diameter
2.5 mm 3.5 mm (1/8")
Conductors / Contacts
3 (Tip, Ring, Sleeve) 4 (Tip, Ring 1, Ring 2, Sleeve)
Signal Format
Unbalanced Stereo / Balanced Mono Stereo Audio + Microphone / Inline Remote
Primary Applications
Cordless phones, two-way radios, legacy mobile headsets, micro audio gear Smartphone headsets, gaming headsets, laptops with combo audio/mic jack
Standard Stereo Pinout
Tip: Left | Ring: Right | Sleeve: Ground —
CTIA Standard Pinout
— Tip: Left | Ring 1: Right | Ring 2: Ground | Sleeve: Mic (Apple, Android)
OMTP Standard Pinout
— Tip: Left | Ring 1: Right | Ring 2: Mic | Sleeve: Ground (Legacy EU)

Other Alternatives to Compare

Compare 2.5mm TRS vs. 2.5mm TRRS → Compare 2.5mm TRS vs. 3.5 mm TRS → Compare 2.5mm TRS vs. 6.35 mm (1/4") TRS → Compare 2.5mm TRS vs. 6.35mm TS → Compare 2.5mm TRS vs. Coaxial Cable Types (RG Series) → Compare 2.5mm TRS vs. RCA → Compare 2.5mm TRS vs. XLR 3-Pin → Compare 2.5mm TRS vs. XLR 4-Pin → Compare 2.5mm TRS vs. XLR 5-Pin →