Features: USB charging, convenient and fast, long-lasting battery life, 2 hours of full charge, 40 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, 4 silicone tips, and 1 cleaning brush. Specifications: Item Type: GE-T18 Hearing Amplifier Material: ABS Color: Blue, Silver, Black (Optional) Max Sound Output: 129 3dB Sound Gain: 40dB 5dB Total Harmonic Wave Distortion: 10 percent Frequency Range:450-3400MHz Input Noise:32dB Voltage: d.c.1.2V Current: 1.2mA Full Charging Time: 2 hours Working Time: 40 hours Battery Capacity: 30mAh Package Size: Approx.12x9x4cm or 4.7x3.5x1.6in Package Weight: Approx.103g or 3.6oz Package List: 1 x Hearing Amplifier 1 x Plug (US or EU) 4 x Earplug Of Different Size 1 x English User Manual 1 x Cleaning brush 1 x Storage Box