In-ear headphones from Sennheiser that both fit well and have good sound isolation. It has up to 10 hours of battery time.
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Sennheiser IE 100 PRO Wireless Dynamic In-Ear Monitoring Headphones, Black
The product is available from £81.21 at international stores.
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Sennheiser IE PRO BT Connector Bluetooth Module for IE 100/400/500 PRO
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