But they are not working at all and I can't send them back. Charging case it's looking like is working but I can't be sure for 100%. I was checking online how to maybe fix them and I opened them. It was showing that they have not enough power to start.
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1 Pair Replacement Ear Pads For Sennheiser Earphones HD 450/440/430/350/400S/458 BT Gaming Headphone EarPads Ear Cushion Cover
Aliexpress UK
The 2.5mm end on this cable is only compatible with Sennheiser HD4.40 / HD4.40 bt / HD4.50 / HD 4.50 BTNC Headphones. DIY Flat Belt Screw Leather Craft Chicago Nail Brass Solid Rivets Stud Head I. 1 Headphone cable.
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Ear Pads For Sennheiser Momentum 2 2.0 HD1 1.0 1 Headphone Replacement Leather Pads High Quality Foam Pads ，BAOMAND
Aliexpress UK
Connection: Bluetooth 4.1. Condition: Used. Accessories: carrying pouch.
eBay
TRANSFORMERS TF-T23 TWS Wireless Headphones Earphones TWS Wireless Headphones Earphones Bluetooth Touch Control Earbuds Headsets
Aliexpress UK
Highly portable travel headphones - such are the PXC 250 mini headphones with NoiseGard™ active noise cancellation technology. New pads supplied. Closed design ensure excellent passive attenuation of ambient noise, allowing you to enjoy your music without distractions.
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Headphone Cable Sound Control Headphone Cable for KOSS PortaPro PP Headset Repair Lines Maintenance Wire Replacement K1KF
Aliexpress UK
The Sennheiser HD 4.40BT Over-Ear Wireless Headphones in Black offer a premium listening experience. With Bluetooth technology, they provide wireless connectivity for convenience. The adjustable headband and ear-cup design ensure a comfortable fit for extended wear, while the noise cancellation feature enhances audio quality. The headphones also feature an in-built microphone, volume control, detachable cable, and a foldable design for easy portability. The sleek black colour adds a touch of elegance to these high-quality headphones.
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Kids Headphones Wired Headphones for Kids with Microphone 85/94dB Volume Limiter Headphones for Girls Boys Foldable Headphones
Aliexpress UK
The Sennheiser HD 458BT Wireless Noise Cancelling Headphones in Black/Red offer a premium audio experience with active noise cancellation and built-in microphone. These over-the-ear headphones feature Bluetooth connectivity and a sleek headband design, making them suitable for both DJ and live monitoring purposes. The stylish red and black colour combination adds a touch of flair to this high-quality and versatile headphone model from Sennheiser.
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Awatrue Kids Study Headphones Headset Headphone Cartoon Earphone with Mic Music Headset Limited Volume 74dB/85dB for Children
Aliexpress UK
The Sennheiser SC 135 USB-A Mono Headset is a wired, single-ear headset designed for professionals seeking high-quality audio and comfort during extended use. The headset features a noise-canceling microphone, ensuring clear communication even in noisy settings.
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FC31 Air Tube Anti-radiation In-ear Headphones 3.5mm Wired Music Headset Radiation Free Earphone Reduction Line Control with Mic
Aliexpress UK
New battery life for up to 30 hours of playback. Refined Active Noise Cancellation (ANC) and Ambient Sound Capture. promptly and professionally.
eBay
Wired Headphones 2 Basic Box 3.5mm In-Ear Stereo Earbuds Mobile Headphones In-line Control Handsfree With Mic
Aliexpress UK