Hearing Aid Portable Small Mini Personal Sound Amplifier In The Ear Tone Volume Adjustable Hearing Aids Care Drop Features: 1. The hearing aid is durable and easy to use. There are 4 different sizes of earplugs, designed to fit any ear. 2. The hearing aid adopts advanced micro-processor technology, and also includes a storage box and a cleaning brush. 3. Designed for those who need a powerful concealed hearing amplifier. It is small in size and light in weight, making it one of the smallest devices available. Description: The highly advanced microprocessor technology makes this hearing aid an excellent hearing amplifier. Specifications: Stanard battery: 2 * AG3 or AG312 button cell (Included) Input noise: 40dB Frequency range: 300-4000Hz Voltage: DC 1.5V Current: 4mA Dimension: 1.9*1.4*1.6cm Package included: 1 * Hearing Aids 4 * Headset (Different Size) 1 * Case 1 * Guide Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2. Please allow slight dimension difference due to different manual measurement.