This is one of the best red light therapytorches I've used, it feels high quality. withan all-metal construction. and it has 3 operation modes.and an additional pulsemode, this light can generate a lot of heat in3 minutes, I use it daily for a shoulder injuryand recently a foot injury. and I like howeasv it is to use.it is also very bright withpowerful LEDsthis is the real deal!lt includes everything needed to get started 2x2500 mAh lithium batteries a lithium batterycharger (l love this design since if a batteryfails vou can just replace it. and the devicewill live on).Device. (3 modes) short presspower button. The first mode is orange (630nm) the Second mode is: red (660 nm). Third mode is near-infrared (850 nm)ForthMode: off.Long press the power button(Pulse/Normal).Pulse mode.then shortpress aqain to select a mode above withpulse support.Built-in Timer: Auto off 3minutes.I highly recommend it, great !