What's in the box: Waterproof IP66/IP67 Power Sports Amplifier 2 DC Power Couplers Stainless-steel Mounting Hardware Customer Information Card Description: Completely re-engineered, the PXA400.4 supplies big power to your speakers, in a compact, waterproof design for the trickiest installs. Features: Waterproof amplifier design with IP66 and IP67 certifications Ideal for UTVs, off-road vehicles, hot rods or space-challenged vehicles High-efficiency Class-D technology Huge power from a small footprint - rated at 800 watts Dynamic Power!** Dual turn-on modes (choice of DC offset or 12v trigger) Includes inline power and ground couplers that need no soldering or crimping Stainless-steel mounting hardware included Specifications: Power (watts/ch), 4 Ohm Mono: 200 x 2 Power (watts/ch), 2 Ohm Stereo: 100 x 4 Power (watts/ch), 4 Ohm Stereo: 100 x 4 Dynamic Power (watts): 800 Frequency Response (Hz, +0/-3dB): 10-20k Crossovers: 80Hz/120Hz hi-pass, 80Hz lo-pass, 24dB/octave Bass Boost: n/a Dimensions (in, mm): W: 4-1/2, 114.7, H: 1-3/4, 45, L: 9-3/4, 247.5 CXARC Remote Capable (sold separately): Yes (AMP2, low pass mode only)