Amazon.com: Airfrex Bluetooth Adapter Receiver with 2.5mm Jack for Sennheiser Momentum 2.0 ON Ear and Over Ear Headphones, Sennheiser Momentum 2.0 Headphone Cable Cord Replacement Connector Converter : Electronics
Sennheiser Momentum Bluetooth | Bluetooth Receiver Sennheiser | Audio Adapter - Protective Sleeve - Aliexpress
Sennheiser 504381 (OR BS-US) Base w/Power Adapter and hook-up's (NO MIC OR EAR ) | eBay
Sennheiser OP - CX black - - Ear adapter black for CX 300 S, CX 3.00, CX 5.00, CX 6.00 BT, CX 7.00 BT, CX SPORT, MOMENTUM In-Ear, MOMENTUM InEar Wireless, MOMENTUM Free
Sennheiser Offical Ear Tips For Momentum In-Ear and CX Models