Features: USB charging, convenient and fast, long battery life, 2 hours of full charge, 35 hours of continuous work. Simple mini design, fashionable color matching. It's not just a hearing aid, it's adjustable to fit both ears. Using digital chip and frequency control, it can easily adapt to different sound environments. The volume is adjustable, so you can change it according to your preference. Small size, lightweight, comfortable wearing feeling, will not cause ear pain, its neutral design makes it the perfect choice for both men and women. You will receive 1 Hearing Amplifier, 1 USB charging Adapter, 3 silicone tips. Specifications: Item Type: JZ-1088H5 Hearing Amplifier Material: ABS Color: Brown Max Sound Output: 118+/- 4dB Sound Gain: 32dB+/- 5dB Total Harmonic Wave Distortion: 5% Frequency Range: 300-3800MHz Input Noise: 30dB Voltage: d.c.1.4V Current: 1.5mA Full Charging Time: 2 hours Working Time: 35 hours Battery Capacity: 30mAh Package Size: Approx.11*11*3.5cm / 4.33*4.33*1.38in Package Weight: Approx.76g / 2.68oz Package List: 1 * Hearing Amplifier 1 * Power Plug 1 * USB Adapter 3 * Earplug Of Different Size 1 * English User Manual