NOTE: You need to confirm whether the DC interface of the adapter matches your device interface. Product parameters: Input voltage: AC 120V (100-240V) 50/60Hz. Output voltage: DC 3V ±0.3V. Output current: 1A. Output power: 3W. Output power cable length: 4.5 ft Output DC interface specification: 5.5x2.5 2.1mm (outer diameter 5.5mm, inner diameter 2.5 / 2.1mm). Output polarity: inner positive +, outer negative -; Work efficiency: about 98%. Output ripple noise: 90mV. Output voltage accuracy: 2%; Working temperature: 0-50 (?) Dimensions: 70x40x26mm (LWH) Weight: 68gram Colour: Black; With overvoltage protection, overcurrent protection, short circuit protection, etc. Package Included: 2 pcs NOYITO 3V 1A Power Adapters