Motorola Droid RAZR HD Smartphone

A single charge keeps Droid RAZR HD powered up for an eye-opening 24 hours of performance with a 4.7" HD display that delivers vibrant visual clarity—the kind you’d expect from an HDTV. At a mere 8.4mm thin, Droid RAZR HD is the world’s most compact 4.7” smartphone. Running on Android™ 4.0, Droid RAZR HD is packed with new features and apps that help you tackle your busy schedule. The Droid RAZR HD is aptX™ enabled for high quality wireless audio over Bluetooth®.

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
  • ~63MHz (stereo encode) on ARMv7A with NEON 
Bit Rate
  • 384 kbps (48 kHz sampling)