Replacement New Ear Pads Cushion For Sennheiser Mm 450-x Mm450x Mobile Multimedia Headset - Earphone Accessories - AliExpress
Sennheiser MM 450-X Wireless Review - RTINGS.com
Sennheiser MM 450 Bluetooth headphones
Amazon.com: Replacement Battery for SENNHEISER 450 Travel 550 Travel MM 400 MM 400-X MM 450 MM 450-X MM 500-X MM 550 MM-550-X PCX 360 BT PX 210 BT PX 310 BT PX