... a gift, a ornament, also a testing tool Car Battery MonitorIt is a gift, ornament, also a testing ... into a cigarette lighter or power receptacleMonitor the car battery condition via cigarette lighter socket Just plug it ... LED display: Red / Blue /GreenOperation temperature: -12-60R. Humidity: 0-85% Yours sincerely,LindaShaanxi xieli photo electric instrument co., ltd Car Battery Meter with LED display ...