Great music on the go. It is small enough to grab on the way out of the house and big enough to fill the room with sound. With the tether hook, the RAD-503 is ideal for clipping on a backpack or throwing in a gym bag.



  • Dual 40mm neodymium drivers in a custom enclosure to generate vibrant sound with deep and loud low bass
  • Single racetrack passive radiator for extending bass frequencies
  • Sleek oval form function with tether loop to clip anywhere
  • CSR BT4.0 chipset with 6 watt (3.7V) amplifier
  • A built in noise cancelling microphone offers simple hands free conference calling
  • 10 hour run time 1250mAh lithium polymer (LIPO) battery
  • 3.5 hour recharge time
  • All RAD-503 models can be connected to play audio via the input jack, cable included
  • Color coordinated Micro-USB braided charge cable and 3.5mm braided audio cable included
  • Dimensions: 2.36 x 6.49 x 2.63in (60 x 165 x 67mm)
  • Weight: 13.4oz (380g)
  • Range: 65ft (20m)
  • Color: Red