This music amplifier is a dual BTL class-D, able to deliver up to 2x25w into 8 ohm speakers, can be designed to display solution or other music player like iphone, ipod, MP3, cell phone, and so on. Features: Volume control Audio output (L/R) Power switch 3.5 earphone input DC Power interface Specification: SNR 90(db) DR 0.01% Input impedance@ Voltage 4Ω@12-18V, 6Ω@12-24V, 8Ω@12-26V size 100mm*66mm*16mm 25W + 25W continuous output power at THD = 10% with RL = 8 Ω and VCC = 25V Wide-range single-supply operation (8 - 26 V) High efficiency (η = 90%) Four selectable, fixed gain settings of nominally 21.6dB, 27.6dB, 31.1 dB and 33.6dB Differential inputs minimize common-mode noise Standby and mute features Short-circuit protection Thermal overload protection Externally synchronizable ECOPACK®, environmentally-friendly package Technology support：support@sbote.com