Features : Voltage meter range: 0.00-9.99-99.9V Current meter range:0-1.00A or 9.99AInternal resistance of the voltmeter:400KΩInternal resistance of the ammeter:0.0065ΩWorking voltage: DC5-28V Measurement accuracy: 0.4% *3Operating temperatur e : -10℃~60℃ Working current: &l..