Sound Amplifier, PHLHA57

Features: - Digital Voice & Sound Hearing Amplifier - Universal Fit Ear-Stud - Built-in Rechargeable Lithium Battery - Charges via the Included Charging Base Dock - Interchangeable Ear Tip to Seal Out the Noise - Selectable Listening Modes: Normal, Noisy Background) - Unique Ergonomic Design to Prevent Occlusion Effect - Circular Volume Adjustment Knob - Active Noise Reduction - Over Discharge/Charge Feature - Wider Dynamic Range Compression What’s in the Box: - Hearing Amplifier - (3) Ear Bud Tips - Charging Base Technical Specs: - Construction Material: ABS - Input Noise: =30dB - Sensitivity: =30dB - THD: 4% - Max Sound Output: 120±5dB - Frequency Range: 200-5000Hz - Power Supply: D.C.3.7-5V - Working Voltage: D.C.1.5V - Working Current: =4mA - Rechargeable Battery: 3.7V Lithium-ion, 15mAh, 0.0555Wh - Dimensions (L x W x H): 0.94’’ x 0.55’’ x 0.35’’ -inches