If you're a little more adventurous, the MOTOTLKR T5 walkie talkie has a rechargable NiMH battery, upto 6km² range, and a built in room monitor and timer. The MOTOTLKR T5 walkie talkie: It's ultimate accessory for anyone serious about adventure and style.
Channels: 8
Range: 6km²(unobstructed line of sight)
2x T5 2 way radios
Rechargeable Battery Pack & Cradle Charger included