Whisper Phones are hands-free, acoustical voice-feedback headsets that help learners hear phonemes (the sounds that compose words) 10 times more clearly... children hear themselves better, and focus better on what they're learning! Designed to help students read, write, spell, memorize, focus, and process language aloud; Whisper Phones strengthen the learning process by intensifying the sound of one's voice and minimizing auditory distractions. Hands-free, lightweight, and comfortable to wear--Whisper Phones can be used in either ear. Dishwasher safe and maintenance-free (no batteries or wires).