1. Dual type meter head design, more adaptable to the use of communication equipment products2. Digital encoder, higher precision, better stability and longer life than traditional analog potentiometer3. Independent USB interface, provide current output capacity, comes with over-current, short circuit protection function4. Intelligent fan control, intelligent heat dissipation5. Input voltage: AC 220V6. Main output voltage: 22/15V7. Main output current: 5A/3A 8. Rated output power: 56W (including USB interface output)9. Protection function: OCP (overcurrent cutoff restorable type) / OHP (overheating protection)10. Other functions: coarse adjustment/fine adjustment, double-stage voltage/current switching, parameter locking function.11. Heat dissipation: Intelligent temperature control air-cooled12. Working conditions: temperature: 0-40 degrees Celsius; humidity: less than 80%13. Storage condition: temperature: -20-70 degrees Celsius; humidity: less than 80%14. Size: about 8.8 x 15 x 21.5cmSpecification: Package Weight One Package Weight 1.20kgs / 2.65lb One Package Size 24cm * 16cm * 10cm / 9.45inch * 6.3inch * 3.94inch Qty per Carton 24 Carton Weight 30.00kgs / 66.14lb Carton Size 50cm * 50cm * 60cm / 19.69inch * 19.69inch * 23.62inch Loading Container 20GP: 177 cartons * 24 pcs = 4248 pcs40HQ: 412 cartons * 24 pcs = 9888 pcs