Rechargeable SMD LED tube (40LED) Model: SF-989UL40 Input voltage: DC 5V Input power: 5W Rechargeable lithium polymer battery 3.7V 1ah x1pc Super bright SMD LED (0.064W) x 40pcs LED bright about 480 lumens DC operation Charging time is about 4 hours Accessories provided: USB charging cable Input voltage: AC 100-240V 50/60 HZ Output voltage DC5V / 1.0A Battery runtime: Soft and bright-about 4 hours Intense and bright-about 2 hours