Passive ultra-high frequency timing ground mat antenna for long-distance running marathon chip timing number book vest timing

Wireless LED timing clock, outdoor waterproof display, single-sided and double-sided screen optional

Passive ultra-high frequency number book/vest/shoe timing chip for long-distance running and marathon timing

Passive dual frequency timing carpet/buried coil for long-distance running training assessment Marathon chip timing high and low frequencies

Passive dual frequency timing host, mid-range running chip timing device, marathon timing, buried timing, high and low frequency

Active dual frequency offline point counting timing host, mid-range running chip timing, 3000 meter training assessment, buried timing

Active dual frequency offline point counting timing chip for long-distance running, 3000 meter training assessment, buried timing

Passive dual frequency timing chip for long-distance running training and assessment, shoe chip for low-frequency activation and high-frequency reception signal