Phone Speaker/Amplifier made of renewable bamboo wood enables you to share your music through passive sound amplification. This bamboo amplifier and phone stand can naturally amplify sound by 10 decibels. Fully customize this Eco-Friendly product with a laser etched logo or full color logo giving your brand lots of exposure. This mobile phone sound amplifier works for phones within 3.34" wide and 0.51" thick. It's compatible with most iPhone's, Galaxy, and other phones within the suitable size.