... and reasonable price Description:1, it can move freely with wireless distance in 10 meters.2, Intelligent connection without match code3 ... the function of Forward and Backward on tollbar 6, Power supply: one or two AA batteries7, Power-saving mode: level 3 ... accessiblyTechnical specification:1. radio wave frequency: 2402 MHz-2480 MHz2. wireless operate channel:16,auto change3. working voltage: 1.5 V4 ...