Specification: Item: Electronic Pulse Massager Power Source: DC4.5V (Use 3*AA alkaline dry batteries or external power source.) Frequency: 2~1000Hz Current Consumption: about 40mA (operating impedance: 500Ω) Battery Lifetime: about 3 months if used for 3 months, 15 minutes/ day (operating impedance: 500Ω) External Size: 150mm (length) × 100mm (width) × 46mm (height) Weight: about 200g (not including dry batteries) Normal Operation: at 5~55°C Environment: humidity < 80%RH Storage and Transportation temperature: temperature -20~55°C Environment: humidity < 10~95%RH Safety Classification: Class II-BF
