Billed as the first completely integrated, cable-free RTK GPS system, Topcon's HiPer Lite requires no external radios or power supply, and eliminates the need for a multi-piece, complex base station. Additionally, it provides mobile GPS surveying up to 1.5 miles away from the base station. The system is easy to use and set up, says Topcon. HiPer Lite is available with dual-frequency GPS reception and continued satellite tracking in adverse reception areas. Estimated price: $23,000 to $28,000.