Sennheiser CX 686i Wired Earphones vs Sennheiser PC31 II Wired Headset comparison

Show Only Differences Highlight Differences	Sennheiser CX 686i Wired Earphones	Sennheiser PC31 II Wired Headset
key specs
Colour	Green	Black
Headphone Type	In-Ear	Over-Ear
Microphone	Yes	Yes
Connectivity	Wired	Wired
Type	Earphones	Headset
general
Brand	Sennheiser	Sennheiser
Model	CX 686i Wired Earphones	PC31 II Wired Headset
Release date	March 30, 2014	March 25, 2013
Colour	Green	Black
Type	Earphones	Headset
Headphone Type	In-Ear	Over-Ear
Connectivity	Wired	Wired
Model Number	CX 686i	PC31 II
product details
Microphone	Yes	Yes
Microphone Impedance (Ohms)	-44	-38
Cord Length (Metres)	1.2	3
Connector Size	3.5mm	3.5mm
Weight (g)	-	226.00
sound features
Impedance (Ohms)	20	32
Sensitivity (dB)	118	109
Frequency Response Range	18Hz-20,000Hz	40Hz-18,000Hz
connectivity features
Bluetooth	No	No