The Sinepower DSP and DSP-T series generate a pure sine wave voltage, which is perfect even for sensitive 230V devices. They are fitted with smart protection circuits for safe operation. In case of overload, overheating, over or under voltage, the clever inverters switch off automatically - and on again when everything's OK. The integrated fan smoothly adjusts to the load and temperature conditions, which makes it pleasantly quiet. The premium inverters in the Sinepower DSP-T series offer two extra benefits; a mains priority circuit with voltage synchronisation and energy saving Smart Standby Mode. Specification: Output Voltage: 230V AC � 10% pure sine wave (THD <5 %) Output frequency: 50 Hz � 0.5 Hz Input Voltage Range: 12V: 10-16.5V DC 24V: 20-33V DC Efficiency: >90 % Heat dissipation: temperature and load controlled fan Ambient temp at operation: 0C to +50C Ambient temp for storage: -30C to +70C Air humidity: 0 - 95%, non-condensing Testing/Certification: CE, E9