HIGH-POWERED AMP : 40W output power & Neodymium magnet Speaker transmit voice louder, clearer and farther without noise or distortionCOMPACT & LIGHT : Only 3.35 x 5.28 x 1.81in & 0.65 lb *br*Ideal for highly mobile instruction or guiding to a large audienceDURABLE & SOLID BODY : Designed to protect against external shocks, drops, dusts and drizzleLONG RUN-TIME & SHORT RECHARGE TIME : Runs for 12 hours per 3 hours charging3.5mm AUX & LINE OUT : Connect with laptop, MP3 player, iPhone, iPad, iPod, Smartphone and other devicesスポーツ&アウトドア