This is £24.99 on the Planetgizmo website with £3.99 delivery on top.
"Nothing can ruin a holiday quicker than unwelcome mosquitoes & Bugs. Help keep them at bay with this solar powered, ultrasonic insect repellent. The device has a four-metre radius and emits a low buzz, inaudible to the human ear. Safe for all the family, including your pets – it’s perfect to clip on your clothes, bag, by the bed or at the table. No mess, no smell, no spray and no pollution, the Sonic Mosquito Repellent holds its charge for 24hrs and recharges in sunlight"