Hitec has released the Battery Buzzer, a compact low-voltage buzzer that will keep you posted if the voltage in your battery gets to low. This lightweight buzzer is a must for anyone on the flight field or running their large-scale trucks all day long. Includes a programmable voltage threshold.
Features:
• High Pitch Warning Sound
• Input Voltage: 7.4 ~ 16.8 volts
• Battery Type: 2 ~ 4S LiPo
• LED Status Indicator
• Voltage Select: 3.2V/3.3V/3.4V/3.5V ±0.05V
• Net Weight: 11g
• Dimension: 1.97 x 1.10 x .49 in.
Battery Buzzer – Stock# 44210
Estimated Street Price: $9.99
[source: www.hitecrcd.com]