Features: Suitable for people who have severe hearing impairment, especially for elderly people. Have more choices for volume control. 7 modes can be chosen: "1" is the minimum volume and "7" is the maximum. "O" is for power off and "N" is for normal work mode. "H" can help you reduce low frequency noise, getting clearer sound. 3 different shape earplugs are provided, which can fit different people's ear. Clamp of this product helps you fix the hearing aid in your pocket. Specifications: Type: Hearing Aid Model: F-18 Material: Acrylonitrile Butadiene Styrene Color: White & Green Maximal Sound Output: 129dB 4dB Maximal Sound Gain: 55dB 5dB Harmonic Wave Distortion: 5% Frequency Range: 450-3500 Hz Input Noise: 30dB Battery: 1 * 1.5V "AA" Alkaline Battery (Not included) Working Voltage: Direct Current 1.5V Working Current: 4mA Item Size: Approx. 4.5 * 2.5 * 7.0cm / 2.0 * 1.0 * 2.8in (L * W * H) Item Weight: Approx. 28.0g / 1.0oz Total Size: Approx. 12.1 * 8.6 * 3.2cm / 4.8 * 3.4 * 1.3in (L * W * H) Total Weight: Approx. 111.0g / 3.9oz Notes: 1. Please read the user manual before using. 2. To protect your hearing, please don't use this product at a high volume for a long time. Package List: 1 * Hearing Aid 1 * Earplug Connector 1 * Component 3 * Earplug 1 * Operation Manual Features: Suitable for people who have severe hearing impairment, especially for elderly people. Have more choices for volume control. 7 modes can be chosen: "1" is the minimum volume and "7" is the maximum. "O" is for power off and "N" is for normal work mode. "H" can help you reduce low frequency noise, getting clearer sound. 3 different shape earplugs are provided, which can fit different people's ear. Clamp of this product helps you fix the hearing aid in your pocket. Specifications: Type: Hearing Aid Model: F-18 Material: Acrylonitrile Butadiene Styrene Color: White & Green Maximal Sound Output: 129dB 4dB Maximal Sound Gain: 55dB 5dB Harmonic Wave Distortion: 5% Frequency Range: 450-3500 Hz Input Noise: 30dB Battery: 1 * 1.5V "AA" Alkaline Battery (Not included) Working Voltage: Direct Current 1.5V Working Current: 4mA Item Size: Approx. 4.5 * 2.5 * 7.0cm / 2.0 * 1.0 * 2.8in (L * W * H) Item Weight: Approx. 28.0g / 1.0oz Total Size: Approx. 12.1 * 8.6 * 3.2cm / 4.8 * 3.4 * 1.3in (L * W * H) Total Weight: Approx. 111.0g / 3.9oz Notes: 1. Please read the user manual before using. 2. To protect your hearing, please don't use this product at a high volume for a long time.