MSA Sordin Dual Pro helmet-mounted active ear defenders with built-in FM radio, audio input for mobile phone, 2-way radio or mp3 player. Sordin say:

"A few large buttons allow simple operation even when you are wearing gloves.
Dual can be connected to most audio sources, such as communication radios, CD players, MP3 players, etc.
Available both as headband and helmet attachment.
Sound level limited to 82 dB(A).
Fast automatic searching of frequency range (88?108 MHz), with memory for last radio channel listened to.
Balance knob for quick and easy adjustment of balance between radio and level dependent function.
Automatic switch-off feature maximises battery life. Low battery warning. Battery life of 120-300 hours depending on operation mode.
Lead with 3.5 mm mono plug included
Choice of accessory leads includes a hands-free lead for mobile telephones.
Weight: 280 g (Headband), 274 g (Helmet mounted)"

INCLUDES BATTERIES!