ASUS ZenFone™ 2 (ZE551ML)

The impressive ASUS ZenFone™ 2 (ZE551ML) is incredibly thin and ergonomic due to its 3.9mm thickness and exclusive rear-key integration.

Powered by a 64-bit 2.3GHz Super Quad-Core Intel® Atom™ Z3580 processor, this is the world's first smartphone with 4GB of dual-channel DDR3 RAM. With built-in support for aptX® audio codec, this powerful phone allows for high-quality audio streaming over a wireless Bluetooth® connection.

RRP

Key aptX™ Features

Consistent audio quality

Fixed compression ratio ensures consistency

Full spectrum of sound

From 20Hz to 20kHz, aptX audio covers the human hearing range

Interoperability testing program

We operate rigorous testing for all aptX enabled products, so you can be confident all products will deliver the same audio quality

aptX™ Tech Specifications

Sound quality
  • THD+N@1kHz: -67dB
  • SNR@1kHz:  93dB
  • PEAQ audio quality:-0.18
  • Qualcomm® Kalimba™ MHz DSP technology: 42MHz@48KHz stereo decode ~45MHz@48KHz stereo encode
Audio Encoding
  • 16-bit, up to 48kHz sampling rate
Program memory usage
  • 3.3kwords (encoder) / 3.6kwords (decoder) 
Data memory usage
  • 1.8kwords
ARM MHz
  • ~63MHz (stereo encode) on ARMv7A with NEON 
Bit Rate
  • 384 kbps (48 kHz sampling)