Pair of Binatone Terrain 550 two-way radios, powered by 4x rechargeable NiCD batteries (supplied) with a battery level indicator and warning light to tell you when it needs recharging. It has 8 channels and 38 interference codes for a maximum 304 talk combinations and thus less congestion. With a maximum range of 8km the Terrain 550 is ideal for walking and other outdoor pursuits, especially as it's also weather-proof and shock resistant. Furthermore, Binatones TRUSOUND feature gives you an enhanced sound quality by reducing any extraneous noise. Other features on the Terrain 550 include 5 call tones, volume control, signal and transmit/receive indicator, keypad lock, super-bright backlit LCD, stop watch and belt clip.