I A S U S Small Portable Headset Amplifier 3.5mm Input and Output - IASUS EAR3 Helmet Amp Boosts 10dB with Most Motorcycle Helmet Comms, Helmet Speakers, Smartphones - Includes Helmet Mount and Cables

* [FEATURES] Designed to boost motorcycle speakers. The EAR3 V2 music headset amplifier output increases without any distortion (up to 10dB boost in volume with no more than a 0.3% harmonic distortion). The EAR3 V2 stereo amplifier includes a volume control machined from aluminum providing precise control for volume settings even with motorcycles gloves on. * [COMPATIBILITY] The output on the EAR3 audio headphone amplifier is a 3.5mm jack for most helmet speakers, earbuds, or headphones with a 3.5mm pin plug. The input is a 3.5mm pin plug for most motorcycle comm systems, smartphones, iPhone, Samsung and music players. * [INSTALLATION] Easy to install. Includes helmet mount with 3m adhesive sticker, short extension cable (5"), long extension cable (10") for flexibility to mount the amplifier on your helmet. * [WARRANTY] 30 days money back guarantee and 1 year limited manufacturer warranty. * [SPECIFICATIONS] Dimensions: 2.0″ x 1.5″ x 0.8″ (51mm x 37mm x 20mm). Output Power: 55mW per channel x 2 @ 16 Ω55mW ...