Packaging

Aside from the mouse, one finds a USB Type-A to Type-C charging cable, wireless extender, wireless dongle, set of replacement feet, set of grip tape, carrying pouch, and quick start guide in the box.

Weight

My scale shows around 52 g (+/- 1 g), which is slightly higher than the weight cited by DELUX. For comparison, the larger and likewise hole-free Razer Viper V2 Pro weighs 58 g, much like the similarly sized and hole-free Endgame Gear OP1we. An excellent weight overall.

Cable

The M800 Ultra comes with a paracord-like, braided charging cable (USB Type-A to Type-C). In terms of flexibility, this one is above average, soundly beating the charging cable of recent Razer mice, to where playing while charging is possible without feeling overly restricted. Its measured length is 1.55 m, and a ferrite bead is attached.

The charging cable also functions as an extension cable if used in conjunction with the wireless extender, which can be used to keep the distance between dongle and mouse as short as possible.

Feet

The feet on the M800 Ultra are regular black-dyed PTFE (Teflon) feet with slightly rounded edges. Glide is decent and thickness average. A set of replacement feet is included in the box.

HyperSpeed Wireless Receiver

As a separate purchase, DELUX offers the HyperSpeed Wireless Receiver, which as of now is only compatible with the M800 Ultra. After pairing the HyperSpeed Wireless Receiver with the M800 Ultra, polling rates of 2000 and 4000 Hz will become available in the software. Pairing is possible without any software by holding the CPI button pressed until the LED starts blinking, and then plugging in the new dongle. However, only one dongle can ever be paired to the mouse, so after pairing the M800 Ultra to the HyperSpeed Wireless Receiver, the included dongle will no longer work, and vice versa.


In addition, a special challenge presents itself when re-pairing the M800 Ultra to the regular dongle after having been paired to the HyperSpeed Wireless Receiver. After turning on the mouse, CPI was much lower than usual, speed-related accuracy variance elevated, and motion delay considerable and easily felt. This state persisted even after turning the mouse off and on again. When this happens, the solution is to plug the mouse in, set the desired polling rate within the software (for instance, 1000 Hz), and switch to wireless operation again. In some cases, plugging the mouse in can be skipped, and merely setting polling rate will be sufficient to restore intended function.