Vizio SB4020E-A0NA SB4020E-A0 Quick Start Guide - Page 9

Using the remote Power Press to turn on or off. Mute Press to mute. Sub Volume Down Press to decrease subwoofer volume. (When optional SUB Out is used) SRS TVOL Press to enable/disable SRS TruVolume. Input Press to change input source. SUB- MUTE SUB+ SRS TVOL SRS TSHD Volume Up Press to increase volume. Sub Volume Up Press to increase subwoofer volume. (When optional SUB Out is used) Volume Down Press to decrease subwoofer volume. SRS TSHD Press to enable/disable SRS TruSurround HD When using the remote, point it at the center of the Sound Bar. The sensor is located there. If your remote stops responding, you may need to replace the battery. To replace the battery, insert a flat-head screwdriver into the slot as shown. Gently push down on the tab, then press and pull downward on the battery cover to open.