Balanced light beam with 5/180 lumens through high-power LED and optical TIR lens. Fully charged via the new USB-C connector within 100 minutes without battery removal. At 51.3mm long and 22g, hardly noticeable on the key ring. Simply turn the lamp head to switch on and off. Initially, the i1R 2 Pro shines with 5 lumens. For... 180 lumens, turn the lamp head a little further.