Product Introduction:
1.Size:2.9*3.0cm
2.Main Chip:LM358
3.9V battery:when battery occurs overdischarge(battery voltage is lower than 8V),red indicator light will be on and buzzer will make sound
4. Application: 12V battery voltage testing
Features:
1.Sound and light alerting
2.Input transposition protecttion to avoid chip burning
Package Includes :
2PCS Module (If the number of products received is incorrect, please contact us . we will refund or give you a replacement)