As to those deaf people, hearing aid is of great significance. Our F-137 Professional Earplug Hearing Aid will be your regretless choice! Specially designed with advanced technology and meticulous workmanship, it provides enough precision and accuracy in sound reproduction. Simple elegant ergonomic design makes this hearing aid much comfortable to wear. What is more, you will hear speeches, concerts and presentations much better if youwear this item. Do not hesitate anymore! You will get a rebirth from this order!<!--Features --><p>FEATURES</p><UL><LI>New and high quality</LI><LI>Easy to use and make voice louder</LI><LI>High effective and reliable to use</LI><LI>While in forest, if you want to hear very slight sound, it will be a good choice</LI><LI>Reasonable price and good after sale service</LI><LI>With earplug design, it is convenient to carry</LI><LI>Suitable for speeches, concerts and presentations</LI></UL><!--Specifications --><p>Specifications</p><table width="100%" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td width="131"> Max Sound Output</td><td width="365"> 130÷5dB</td></tr><tr><td width="131"> Sound Gain</td><td width="365"> ◎50dB</td></tr><tr><td width="131"> Toutal Harmonic Wave Distortion</td><td width="365"> ●3%</td></tr><tr><td width="131"> Frequency Range</td><td width="365"> 300~4000Hz</td></tr><tr><td width="131"> Input Noise</td><td width="365"> ●30dB</td></tr><tr><td width="131"> Voltage</td><td width="365"> DC 1.5V</td></tr><tr><td width="131"> Current</td><td width="365"> ●3mA</td></tr><tr><td width="131"> Dimensions</td><td width="365"> (1.77 x 1.38 x 0.59)" / (4.5 x 3.5 x 1.5)cm (L x W x H)</td></tr><tr><td width="131"> Weight</td><td width="365"> 84g / 2.96oz</td></tr></tbody> </table><!--Package Includes --><p>Package Includes</p><ul><li>1 xHearing Aid</li><li>2 x Battery</li><li>1 x User Manual</li><li>4 x Earplug</li></ul><!--Extra Info --><!--produts_compatibility -->