Hear every word up to three times louder - up to 24dB. This amplifier is ideal for cellphone users in noisy environments, or for people with hearing loss. Most cellular, mobile and cordless headset-ready phones with 2.5mm jacks are compatible with this amplifier (an adapter may be required if your phone does not have a 2.5mm jack). To use, the amplifier connects between the phone and headset or earbud (headset, earbud not included).
    The amplifier features voice/sound activated operations, volume control, and will automatically turn on/off when the phone is not in use. It includes a belt clip and uses three AC675 type standard hearing aid batteries (included).

Summary of Features:

• Hear every word up to 3 times louder >> up to 24 dB.
• Plugs directly into cell phone through the 2.5 mm headset jack.
• Adjustable volume clarity.
• Works with most cellular, mobile and cordless headset-ready phones.
• Voice/sound activated operations.
• Separate headset required.
• Requires 3 zinc air type 675 or AC675 batteries(included).
• Battery Life: 30-40 hours of continuous talk time depending on usage and volume settings.
• Automatically turns ON/OFF to conserve batteries.
• Belt clip included.
• Lightweight.
• Finally an amplifier for your cell phone & headset that works!.
• Note:Use of this product requires a telephone with a 2.5 mm telephone jack and a compatible headset. If your phone does not have a 2.5 mm telephone jack, an adapter may be required. Check with the manufacturer of the telephone equipment.