The Panasonic RB-HF420B Bluetooth headphones On Ear in black are the ideal outdoor companion with their long battery life and extremely lightweight housing. The foldable design of the Panasonic Bluetooth headphones means you can take them with you wherever you go, while a 30 mm sound transducer provides robust bass when you're on the move. Just as practical: the Bluetooth headphone microphone is integrated in the RB-HF420B and can be activated by voice control - completely hands-free. This means that the integrated Bluetooth headset can not only be used to make phone calls, but also to select phone and app functions via voice control. Operating your smartphone wirelessly via Bluetooth headphones has never been so easy. These headphones are particularly lightweight. The soft material and the ear-enclosing pads mould comfortably to the shape of your head.