Set of Gen2 Arccos Sensors with a Gen1 Link. Selling as-is -- these worked just fine the last time I used them, but I have no idea how much battery life is left in each of the sensors or whether there will be pairing issues or anything. I'm selling because I've decided to go with Garmin -- Arccos provides far better stats, but Garmin integrates with my watch, which is my deciding factor. Breakdown of what's included: 12 sensors used starting in 2018, but used sparingly - they took extended breaks when trying other products (e.g. used Shot Scope for the 2019 and most of 2020 season), last use was late 2021 1 sensor used since mid 2021 2 sensors brand new in bag 1 putter sensor, newer/smaller model, used 1 season 1 Gen1 Link - works great, used 1 season