LED BATTERY NYSTAGMUS SPECTACLES - white With LED and inner function that makes easier watching the rashes within a particular time period (30, 60, 90 seconds). This model allows wireless working and is provided with power through the adjustable battery placed above the spectacle. Requires three 1.5 Volt batteries, size C LR14/AM-2 (baby cells). Illumination can be adjusted through a turn of the switch.