Protect your important investment with the Matek 3 In 1 Battery Monitor !#!amp!*! Discovery Buzzer !#!amp!*! Signal Loss Alarm! With a 3-in-1 design? it notifies you via ultra bright LED and twin loud buzzers when dangerous low voltage is detected. In this way? you won¨t lose the aircraft any more! Made of high-grade materials? it is highly reliable and durable. Small and light design easily fits mini multicopters. With such great functions and affordable price? what are you waiting for? Click and order right now!                                    Features             3-in-1 design? integrate LiPo battery monitor? discovery buzzer? and signal loss alarm<br> Notify you via ultra bright LED and twin loud buzzers when low voltage is detected<br> No need to worry about losing the aircraft any more<br> Small and light design easily fits mini multicopters<br> High quality? stable performance <br>                                                            Specifications             Working Voltage     5.2-26V DC? 2-6 Cells LiPo    <br> Standby Current     Less than 10mA    <br> Working Current     Max 120mA (Blinking & Beeping)    <br> Voltage Threshold Setting     3.4-3.7V / Cell (Red LED)    <br> Twin Loud Buzzers     85db Each    <br> LED Brightness     20lm 0.2W    <br> LED Color     Blue    <br> Suitable for     Multirotors    <br> Dimensions     (1.42 x 1.42 x 0.24)" / (3.6 x 3.6 x 0.6)cm (L x W x H)    <br> Weight     0.25oz / 7g       <br>                                                             Package Includes            1 x 3-in-1 Battery Monitor & Discovery Buzzer & Signal Loss Alarm<br>