- Will automatically flash if voltage drops down to 11.5V - Illuminated digits make it attractive and easy to read at night - Compact size for an easy install on the bike - Volt meter: DC 8 to 18 V. Per DC 0.1 V - Voltage warning: Flashing light when < 11.5 V - Effective temperature range 14 to 140 °F (‑10 ~ 60 °C) - Power DC 12 V - Meter standard JIS D 0203 S2 - Dimensions: 56.4mm x 27mm x 11mm - Meter weight ±20 grams - Complete with instructions