Specifications:
▪ Total voltage display range: 0.5V~36V
▪ 1S test mode voltage range: 3.7V~30V
▪ Low voltage buzzer alarm mode 2S – 8S
▪ Alarm voltage setting range: OFF~2.5~3.8V
▪ Weight=16g
Purchase Link: https://flyingmachines.in/product/battery-v-checker-buzzer-1-8s/