3W emergency exit sign with dual-sided indication function, which has passed CB and CE certification testing.Double sided exit sign battery uses LiFePO4 3.2V 1500mAh, providing up to 3 hours of emergency lighting. This CB Approved emergency exit sign uses high-quality light guide plates to ensure uniform and soft light, wall mounted ,ceiling mounted and ceiling recessed installation are optional, suitable for various indoor emergency lighting needs. Parameters Emergency exit sign Power:3W LED qty:2835/6pcs Material:iron spraying+ABS+glass Neutral color box Dimension:31*18*4.5cm Input voltage:AC100-240V,50/60Hz Battery: LiFePO4 3.2V 1500mAh Emergency time:3hrs Installation:Wall mounted,ceiling