This is Douk Audio's own brand, Nobsound. Nobsound features a low price coupled with high performance in a small, simple package delivering high fidelity, specially designed to provide the audiophile with the performance they deserve. Now we want to introduce you our newest preamp B07719G56B, which suits very well for this amp. This unit can easily power high-performance headphones including the HD 580, HD 600, HD 650, K 701, K 702, Q 701, and many more. 24~600Ω headphones would be recommended and armature earphones are not suitable. Package includes: headphone amplifier, 6J9 vacuum tubes (x2), and power supply.

[HIGH QUALITY RECORDING]--ZHKUVE voice recorder has 1536Kbps high quality PCM recording(uncompressed),or 192Kbps MP3 format recording.The digital recorder with high-definition noise reduction recording program,providing a super clear recorder voice as if you're actually in the recording scene. [SUPERIOR PERFORMANCE]-- Built in 3 ultra-sensitive and noise reduction microphones, providing you crystal clear recordings even when you're up to 60 feet away.Therefore the audio sound recorder is perfect for lectures,meetings,speech,class,interviews,concert,and also ideal for students,teachers,businessman,musician,kids. [WORK LONG TIME&RECORDING]--8GB Internal memory( support 32GB TF card),using the huge memory capacity to store any other type of data files and songs.Built in with 600mAh rechargeable lithium battery,single full charge could continuously record 160 Hours.