User manual Sennheiser RS 175 (English - 37 pages)
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Sennheiser RS 175 Digital Wireless Headphone System (AUTHORIZED DEALER)
2x 900mAh Rechargeable Batteries for Sennheiser HDR, PXC, RS Series Headphones | eBay
RS 175, problem charging up. I dunno why but recently notice that my Sennheiser died faster than usual (less than 2hs) and I noticed this, does anybody's know why it's failing? :