Weight: 146g; Dimensions: 5.31inx1.46inx0.98in (13.5cmx3.7cmx2.5cm); Number of Modes:5 Mode Arrangement:Hi>Mid>Low>Fast Strobe>SOS; Mode Memory: Yes (Remember the last mode you used, when turned on next time it will automatically turn to the next mode. i.e.when it was Low before turning off, next time you turn on it will be Fast Strobe mode).