• This item can be used in: water purifiers and filters & drink quality monitoring, pools and spas, aquariums, hydroponics.
• Hold function: Saves measurements for convenient reading and recording
• Auto-off function: Turns off meter after 10 minutes of non-use to conserve batteries
• No include battery

This item can be used in: water purifiers and filters & drink quality monitoring, pools and spas, aquariums, hydroponics.ShineSong