Please note this is a final sales, Cancellation can not be processed. Please note that buyers outside the USA might need to pay customs and any import fee. Place PRE-ORDER for the Mass Production BOSeTAMPER 58.5mm now. This version does NOT work in a bright, very sunny place, so it might not work well for an outdoor coffee cart that directly gets a lot of sun. There is NO warranty, but I always offer remote support to get optimum functionality. Some main components could be sourced in Amazon.com (ie. battery). This promo is including the Wireless charging pad. Here is the charger that works well (tested), strongly recommended: Apple MagSafe Charger Baseus Wireless Charger for Magsafe15W Mini If you have any question, please DM to https://www.instagram.com/bosetamper/ Or leave a Chat message in the online store https://bosetamper.com/ Compatible to 58mm portafilter with 2-locking "ears" type only. Tested and work with: (update 6/28/22) Rancilio Silvia Bottomless portafilter Bezzera Matrix portafilter LA Marzocco bottomless portafilter Gaggia bottomless Portafilter Breville Oracle bottomless Portafilter Decent portafilter Weber Unifilter WPM KD330 portafilter Lelit Bianca portafilter Does NOT work with: (update 9/21/23) Sworksdesign Black portafilter (flap not reflective)->unless you put reflective tape Nuova Simonelli portafilter (the flap is too thick) WPM Espresso Machine KD-330 (the flap is too thick) La Marzocco KB90 (the flap is too wide) Dalla Corte Portafilter (the flap is too thick) Victoria Arduino Black Eagle (the flap is too thick) Tested and work with basket: (update 4/18/22) IMS Nanoquartz basket IMS Competition basket VST basket E&B Lab basket The improvements (compared to the 3dprint version): Body/case injection molding PCB is a optimized custom design Firmware power management much longer Oled screen about at the same location Buttons are now capacitive sensor (no more mechanical switches) The power button is on the top side for more convenience Battery much easier to replace by yourself (9v micro usb type) Key Features: Auto-shutdown power management (for a longer usage time) Auto-stop wireless charging when battery full (for a longer battery lifetime) Tamping max depth is about 20mm Specifications: Weight: Product: 315 grams Shipping: 480 grams Dimensions:: Product: 92mm x 92mm x 72mm Shipping: 115mm x 115mm x 100mm Power: 9v battery Rechargeable: by standard Qi wireless charging Time fully charge: 1 - 2 hours Stand-by time: about 24 hours (need recharge afterward) Force: 25-30 lb force BOSeTAMPER is PCT international patent and trademark pending.