Mini in Ear Canal Hearing Amplifier Mild-Moderate Loss Body Size:9.6*15*16mm battery Size:AG3/A10 Battery life: #A10 for 80 hours 1.Mini size at fingertip,0.35x0.6x0.8inch 2.In the ear canal ITC 3. Peak OSPL 90 (dB SPL):≤115dB 4.Frequency range:300-4500Hz 5. Peak gain: ≤35dB 6. Input noise: ≤30dB 7. Adjustable volume ,power on/off 8. Mild/moderate hearing loss