Amazon.com has a Sennheiser RS-120 On Hook Charging Wireless Headphone for $39.99 with Free Shipping.
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- Open-Aire, circumaural, dynamic, stereo headphones n
- Detailed warm sound reproduction with strong bass response n
- Convenient metal stand for storing and recharging the headphones n
- Easy recharge: simply place the headphones onto the charging stand n
- Transmitter can be optionally wall mounted