*. Model : SP-2217

*. Range : 0 ~ 30 ppm

*. High, Low, STEL, TWA setting

*. LCD Digital Display

*. Max. Min. display function

*. Alarm Red Lamp

*. Alarm buzzer : 90dB

*. Alarm vibration

*. CR2 Battery powered

*. 54x91x32mm, 120g