MEDcaTM High Quality ITE Mini Rechargeable Ear Hearing Amplifier Complete 12 piece set, comfortable for either ear 1 amplifier, 1 charging adapter, 1 protecting and carrying case 1 strap, 2 amplifier cleaning tools, 5 ear tips, 1 owner's manual Troubleshooting: 1- Check if the power is switched on 2- Make sure the amplifier is fully charged 3- If it wasn't being used for a long period fully charge battery before use 4- Make sure volume is set correctly. If these troubleshooting tips dont work your product might be damaged or defective, please contact us for a free replacement! This hearing amplifier is rechargeable so there is no need to keep buying replacement batteries.