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Amazon.com: (Taelectric) 9V AC Adapter for Sennheiser Set840 Set 840S TR840 Type 15.3916 Listening System : Electronics
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Amazon.com: SLLEA 9V AC/DC Adapter for Sennheiser Set 840 Set 840S TR840 Type 15.3916 Wireless Stereo TV Headphone Listening System 9VDC Power Supply Cord Cable PS Charger (Not 13.5V) : Electronics
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UpBright 13.5V AC/DC Adapter Compatible with Sennheiser Set 840 Set 840S TR840 900 RI900 Wireless Stereo TV Headphone Listening System 13.5VDC DC13.5V 13.5 V Power Supply Cord Charger PSU (Not 9VDC)
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Amazon.com: Accessory USA 9V AC DC Adapter for Sennheiser Set 840 Set 840S TR840 Type 15.3916 Wireless Stereo TV Headphone Listening System 9VDC Power Supply Cord (Not 13.5V) : Electronics
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SENNHEISER Replacement Rubber Ear Tips for Set 830, Set 840, Set 830S, Set 840S, Set 900 - (5 Pairs) | LIBERTY Health Supply
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