Can the Bryton Gardia R300L Cycling Radar Taillight, priced at $129.00, compete with the $199.99 Garmin Varia RTL515? DesFIt gives us his opinion along with a complete review of features. Bryton is GPS cycling computer company based in Taipei. They have eight computers and the Gardia in their lineup. They sponsor several European-based cycling teams, including Intermarché–Circus–Wanty and the now famously defunct B&B Hotels. Bryton only appears to have two US-based retailers, one in NY and one in TX, so you’ll have to shop online if you want to buy one.