1. The signal generator is small in size, has many functions, easy to operate and easy to carry.2. The key layout is reasonable, all functions have independent corresponding keys, easy to operate.3. Built-in battery, low power consumption, long standby time.Features: - Portable handheld size, easy to carry- Universal digital multimeter, wildly useful and versatile- Large LCD display screen, easy to read- Strong anti-interference ability- Auto power off after 15 minutes of inactivity- Be used to measure AC current, resistance, continuity, diode, etc.Specifications: - Model: ZT302- Material: ABS- Battery type: 2 x 1.5V AAA battery (not included)- Update rate: 3 times / second- LCD: 9999 counts- Resistance: 99.99 ohm - 9.999M ohm + / - (0.5pct + 3)- Capacitance: 9.999nF - 9.999mF + / - (2.0pct + 5)- Frequency: 99.99Hz - 9.999MHz + / - (0.1pct + 2)- Ranging: auto / manual- Operating temperature: 0 - 40 degree- Storage temperature: -20 - 60 degree- True rms: yes- Diode: yes- Continuity: yes- Low battery display: YesPackage Includes:1 x Multimeter