speaker made of bamboo

this is a product thath can be use with any smarthphone , is respectful with the enviroment and is made of bamboo, it doesnt have any electrical components , and it doesnt need electricity to work

this product works with two cuts on each endof the bambooand also with another cut below , for another hole is inserted the phone , this is hpw the sound is amplified , thas the way adds a particular sound 

so go and make your own speaker bamboo!!