When I put the headsets on the base unit (which is plugged in) the charging light for the headsets turns neither red nor green. No lights at all. Why

I have noticed the same thing on at least 2 models of Sennheiser headphones. In my experience, the light does in fact light up (albeit dimly) after about 15-30 seconds. This design flaw really limits usability for seniors, whose eyesight might not allow them to see it. But I will also say that we have never run into any other technical issue with this company's headphones. One last item, it might (emphasis on might) be due to the rechargeable batteries may need to be replaced. Unfortunately the only was to test this is the run them down all the way, and try to recharge them.

do they connect by bluetooth?

Thanks for your question. The transmitter connects to TV via analog RCA outputs or 3.5mm analog (headphone) jack. It has no bluetooth capability. World Wide Stereo – since 1979 – and a proud authorized Sennheiser dealer.

Who sells extra bluetooth rs120 headsets? i have seen some older rf versions of the 120 headset for sale but not the newer bluetooth version.

I never looked for the Bluetooth version, so I’m not sure. I vaguely remember seeing headsets on sale on EBay, and I believe that the manufacturer website has a link to a parts department.

Rs 120 W On Ear Wireless Headphones For Crystal Clear

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Description

🎶 Elevate your TV time with wireless freedom and sound that speaks your language.

ALL DAY COMFORT - Lightweight on-ear design with low headband pressure means marathon TV sessions without fatigue or discomfort.
EFFORTLESS CONTROL - Intuitive volume dial right on the headphones puts you in command without fumbling for remotes.
SMART CHARGING DOCK - Convenient transmitter and charger combo ensures your headphones are always ready to deliver crystal-clear sound.
UNINTERRUPTED FREEDOM - Enjoy up to 60 meters of wireless range—move freely around your home without losing a beat.
TAILORED LISTENING EXPERIENCE - Switch effortlessly between Speech, Music, and Neutral modes to customize your audio vibe for every moment.

The Sennheiser RS 120-W wireless headphones deliver premium, crystal-clear stereo sound with three customizable audio modes. Designed for comfort and convenience, they feature a lightweight on-ear build, intuitive volume control, and a robust 20-hour battery life. With a 60-meter wireless range and a combined transmitter/charging dock, these headphones redefine home entertainment listening for professionals who demand quality and ease.

Specifications

ASIN	B0B7P9R373
Additional Features	Wireless Audio
Age Range Description	Adult
Antenna Location	General activities for listening to music, video streaming and playing games
Audio Driver Type	Dynamic Driver
Battery Average Life	20 Hours
Battery Charge Time	20 Hours
Best Sellers Rank	#10,111 in Electronics ( See Top 100 in Electronics ) #166 in On-Ear Headphones
Bluetooth Range	60 Meters
Bluetooth Version	5.2
Brand	Sennheiser
Brand Name	Sennheiser
Built-In Media	Headphones HDR 120-W, Transmitter TR 120-W with stereo RCA audio cable, Mains unit with country adapters (EU, UK, US, AUS), Two rechargeable batteries: 1.2 V (AAA), NiMH, Adapter for audio connection 3.5 mm, Quick guide & safety guide
Cable Features	Without Cable
Carrying Case Battery Charging Time	20 Hours
Carrying Case Color	Black
Carrying Case Material	Plastic
Color	Black
Compatible Devices	Television
Connectivity Technology	Wireless
Control Method	Touch
Control Type	Volume Control
Controller Type	Volume Control
Customer Package Type	Standard Box
Customer Reviews	3.9 out of 5 stars 3,400 Reviews
Ear Placement	On Ear
Earpiece Shape	angular or flat
Enclosure Material	Plastic
Form Factor	On Ear
Frequency Range	20Hz to 20,000Hz
Global Trade Identification Number	04260752330367
Headphone Folding Features	On Ear
Headphone Jack	3.5 mm Jack
Headphones Ear Placement	On Ear
Impedance	24 Ohms
Is Autographed	No
Item Weight	695 Grams
Manufacturer	Sennheiser Consumer Audio
Model Name	RS 120-W
Model Number	700171
Noise Control	None
Number of Items	1
Series Number	700171
Specific Uses For Product	Music
Style Name	RS 120-W
Subject Character	no character
Theme	Movie
UPC	810091270363
Unit Count	1.0 Count
Warranty Description	1 Year Manufacturer
Water Resistance Level	Not Water Resistant
Wireless Technology	Bluetooth

Reviews

J**N

31.03.2023

K**H

7.01.2026

B**D

22.07.2023

R**N

11.03.2024

L**S

30.01.2025

F**R

3.08.2024

D**C

27.10.2022

M**E

14.04.2026

C**N

15.01.2025

A**R

17.10.2025

C**N

15.04.2026

M**4

15.10.2023

A**S

18.04.2025

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RS 120-W On-Ear Wireless Headphones for Crystal-clear TV Listening with 3 Sound Modes, Lightweight Design, Easy Volume Control, 60 m Range and Convenient Transmitter/Charger Combo - Black

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