Used for 2S - 6S (7.4V - 22.2V) Li-Po Battery. Alarm set value range:OFF~2.7~3.8V. Battery Board Size: approx. 4 x 2 x 0.3cm (L W H). Weight: About 4g (with cable). Cable Length: approx. Have SWITCH BUTTON to select 4.8V / 6V.
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