Portable Phone Amplifier improves phone communication. The perfect phone amplifier for the hearing impaired, this compact, portable unit straps on to any corded, cordless or payphone handset to amplify the caller’s voice up to 20 times louder. Digital speech-enhancement technology ensures you can hear every word clearly. Uses 2 AAA batteries, included; comes with carry case. 2 1/2" x 2 1/2" x 1". No express shipping. Allow up to 2 weeks for delivery.