With simple and lightweight design, this power amplifier is portable and easy to operate.This 50W+50W mini digital power amplifier is equipped with a AUX input interface so it can be used with audio sources to drive common small speakers.Made of aluminum alloy material and the product is durable and reliable to use. The output adopts TDK inductors and the coupling adopts Siemens capacitors.The length of the product is 12cm, the width is 9.5cm, the height is 3.2cm.It has a wide applicability and can be used for living room, study, office, etc. It has built-in NE5532 preamplifier, which can be replaceable.Item Name: Power AmplifierMaterial: Aluminum AlloyModel: 502APRORated Voltage: 24V/4AChip: TPA3116D2Plug Type: EU Plug, AU Plug, US Plug, UK PlugPower Output: 50W+50W/4Ω, 30W+30W/8ΩInterface Input: RCAInterface Output: Speaker (R + L)Input Interface: AUXImpedance: 4-8ΩDistortion Rate: 0.04 PercentSignal-to-noise Ratio: 96 DecibelsVolume Control: Switch/Front PanelFeatures: TPA3116D2 Chip, Stable, MultifunctionalSize Details: 12cm x 9.5cm x 3.2cm/4.72" x 3.74" x 1.26" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measure.Package Includes:1 x Power Amplifier1 x Power Adapter1 x User Manual