The ultimate Rimba Box for massage therapy! It brings electro sex to a new stimulating level. This independently control the power of each channel. Power levels display on digital screen.One sensation applies to all 4 channels.Built in timer plus too many features to list! Battery powered or use included plug-in power adaptor. Even stronger than the 880 2 channel unit.Beautiful display box with gold metallic ink. Compatible with over 30 Rimba electro sex accessories.