11 22 33Features:.WBGT (wet-bulb globe temperature) became widespread for the use in workplaces and sports situation.Using to control and monitor of physical activity in hot environment to limit the danger of heat related injuries.Adjustable WBGT alarm setting, if the WBGT value over the alarm threshold, the buzzer will sound along with the flashing Display.3 ways to use, wear in your arm or mount it on the tripod, walls.4 Dangerous Level indicator display: Caution / Vigilance / Strict / Danger.Specifications:Color: black&whiteTemp. range: 0-50/32-122Temp. resolution: 0.1/0.1Black Ball Temp. range: 0-80/32-176Black Ball Temp. resolution: 0.1/0.1Relative humidity range:Relative humidity resolution: 0.1 RHHeat Stroke Index(WBGT) range: 0-50/32-122Heat Stroke Index(WBGT) resolution: 0.1/0.1WBGT Temp.: IN(indoor), OUT(outdoor)Operating condition: 0~50C/32-122, 10~90% RHStorage condition: -10~55C/14-131, 10~90% RHPowered by: 2 * 1.5V AAA(not included)Item size: about 117 * 59 * 45mmPacking List:1 * WBGT Meter1 * Arm Strap1 * English Instruction Manual1 * WBGT Meter1 * Arm Strap1 * English Instruction Manual