1.Compatible With: For Axial SCX10 / SCX10 II / Traxxas TRX-4.Through the design of the high-powered speakers, speakers and custom make sure small premise has the very good sound field. 2.Can download and use other sound effect with RC/PLUS app.Can upload custom engine voice and other sound effect 3.Real reproduction of engine sound.Support AUX channel.Use advanced DNS / DCR algorithm to reproduces real engine sound 4.Intelligent state tracking compensation, similar to the real vehicle, aircraft, the movement of sound 5.Support R/C PLUS APP For: Uploading voice, the firmware upgrade Output is Short-Circuit, Overload and Thermally Protected. Specifications: - Color: Black - Size: Approx. 8x4.5x4.5cm/ 3.15x1.77x1.77" - Supply Voltage Range: 5-26V - Speaker Impedance: 4Ohms - Speaker Power: 5W - Output Power Under 4 Ohms: 20W/3S(12V) - Number of Audio Channels: Dual channel 30W max Package Included: - 1 x ESS-DUAL Plus Sound Module - 1 x Quick Guide - 2 x Double-Sided Adhesive - 1 x S-link - 1 x Y Line - 1 x ESS Holders Set - 1 x English User Manual