TechPowerUp published a review on the HyperX Pulsefire Haste 2 Wireless
A quote from the article:
The Pulsefire Haste 2 Wireless loses the holes, yet keeps its weight at 60 g, and also comes with the new HyperX 26K sensor and HyperX main button switches rated for 100 million clicks. Capable of both 2.4 GHz wireless and Bluetooth, the Pulsefire Haste 2 Wireless is said to have a battery life of up to 100 hours.HyperX Pulsefire Haste 2 Wireless Review