RM303 is a 19999 counts Auto-Ranging Digital Multimeter. It Is Battery-Powered With True-RMS, A LCD Display And A Backlight.Auto-Power Off RM303 is a high precision, stable performance, battery-driven high reliability and high accuracy automatic digital multimeter with a large LCD display and a backlight. It can accurate measure AC/DC voltage and current, resistance,temperature,continuity and diode with Range REL MAX/MIN and Hz% function button. Features: Measurement function: AC/DC current, AC/DC voltage, resistance, frequency. Large LCD display, maximum display 19999 counts. Auto turn off if there is no measurement within 15mins, energy-saving and safer. Data hold and backlit LCD with large digits for visibility in dimly lit areas. High precision, mini size, portable, and easy to carry. Protective rubber guards with anti-break bracket design Widely used in laboratory, factory and family for circuit or instrument maintenance and repair. Specifications: Model: RM303 Material: ABS + Metal Color: Red + Black DC Voltage: 1.9999V/19.999V/199.99V/1000V (0.05%+3) AC Voltage: 1.9999V/19.999V/199.99V/1000V (0.3%+3) DC Current: 199.99A/1999.9A/19.999mA/199.99mA/1.9999A/10.000A (0.5%+3) AC Current: 199.99A/1999.9A/19.999mA/199.99mA/1.9999A/10.000A (0.8%+3) Resistance: 199.99 (0.5%+3),1.9999K/19.999K/199.99K (0.2%+3),1.9999M/19.999M (1.0%+3), 199.99M (5%+3) Capacitance: 9.999nF(5%+20), 99.99nF/999.9nF/9.999F/99.99F/999.9F (2.0%+5), 9.9mF (5.0%+5) Frequancy: 99.99Hz/999.9Hz/9.999KHz/99.99KHz/999.9KHz/9.999MHz (0.1%+2) Duty Cycle: 1%~99% (0.1%+2) Sample Rate: 3 times per second Working Environment: 0~40 Relative Humidity: < 80% Battery: 2 x 1.5V AAA(not included) Item weight: 200g / 7.06oz Package weight: 332g / 11.69oz Item size: 160 * 80 * 40mm / 6.30 * 3.15 * 1.57in Package size: 175 * 110 * 50mm / 6.89 * 4.33 * 1.97in Note: 1. Do NOT exceed the "maximum value" indicated in the Specification; 2. Do NOT input voltage at the Current Mode, the Resistance Mode, the Diode Mode, the Continuity Mode, or the Temperature Mode; 3. Do NOT use the product when the batteries or the battery cover is not placed properly; 4. Turn off the product and remove the test leads from the test points before changing batteries or fuses. 5. Do not input voltage exceeds 36V DC or 25V AC when you are at the setting of measuring current. Package List: 1 * Digital Multimeter 1 * Test Leads 1 * User Manual The product is battery-powered with true-rms, LCD display and backlight. 1. Do NOT exceed the "maximum value" indicated in the Specification; 2. Do NOT input voltage at the Current Mode, the Resistance Mode, the Diode Mode, the Continuity Mode, or the Temperature Mode; 3. Do NOT use the product when the batteries or the battery cover is not placed properly; 4. Turn off the product and remove the test leads from the test points before changing batteries or fuses. 5. Do not input voltage exceeds 36V DC or 25V AC when you are at the setting of measuring current.