COB (Chips on Board), is a new technology of LED packaging for LED light engine. Multi LED chips are packaged together as one lighting module. A chip on board LED is basically a LED chip diode built directly on the circuit board. Supplied with a strong magnetic base and twin universal joints plus interchangeable plugs BS & EU plus cigarette lighter adaptor.Working time: 4.5 hours (low), 2.5 hours (high); charging time: 6 hours. Switch modes: high/low/off, brightness 1200 lumens (high) & 600 lumens (low). CE, UKCA & RoHS compliant.