5W Portable Amplifier 1 Channel Input,Gain Control,Volume Control,Tone Control,Overdrive Effect,Headphone Jack Speaker: 5" 5W Portable AmplifierProduct name: ... ,EN71, RoHS, ASTM, ISO9001:2000 Features:1 Channel Input Gain ControlVolume Control Tone ControlOverdrive EffectHeadphone JackTechnologies parameter: Output Power 5W 4Ω S ... . We will be at your service any time. 5W Portable Amplifier