Does this amplifier include the two batteries?

No, it just comes with a power supply.

Does this need a DAC in order to work properly?

It needs an analog signal. So you could connect it directly to your computer using your computer’s headphone port. But I strongly recommend buying a DAC and connect it to your computer through A USB port. The O2 is an excellent amp. Adds no color to the music. And there is absolutely no noise. I use the Topping D10 DAC, available on Amazon for about US$90. The O2 is a great amp if your looking for an amp that lets you hear the music the way the arist and album producer intended it to sound. Also, it has enough power to comfortably drive headphones with as much as 600 ohms immedance.

is there any difference between this amp and the Massdrop O2 Amp?

Hope this helps. I needed to drive Massdrop Sennheiser HD 58X Jubilee Headphones 150 ohms impedance this would not drive without distortion on games and music at standard gain (under 300 ohms). The massdrop 02 is great if pared with the massdrop DAC. Really consider your impedance.

Will it work good with audeze lcd 3 (110 ohm) and sennheiser hd 800 s (300 ohm) ?

Yes it will easily drive both headphones.

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Mayflower Electronics Objective2 Headphone Amplifier

Mayflower Electronics Objective2 Headphone Amplifier

Product ID: 343802021

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Details

Brand
Mayflower
Connectivity technology
Wired
Included components
Ear Cushions
Age range (description)
Adult
Material
Plastic

⚡Low noise, high power output

🎧Universal headphone compatibility

🔊High-fidelity audio boost

Description

🎶 Elevate your sound game—don’t just listen, experience every note!

PURE AUDIO POWER - Experience crystal-clear sound with the Objective2's high-fidelity amplification.
COMPACT YET MIGHTY - Sleek design packs powerful output without taking up desk space.
AUDIOPHILE APPROVED - Trusted by professionals for precise, balanced sound reproduction.
NOISE FREE LISTENING - Enjoy your music without distractions thanks to ultra-low noise circuitry.
PLUG PLAY VERSATILITY - Seamlessly compatible with a wide range of headphones for ultimate flexibility.

The Mayflower Electronics Objective2 Headphone Amplifier delivers high-fidelity, low-noise amplification compatible with most headphones, designed for audiophiles and professionals seeking pristine sound quality in a compact form.

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