Much lighter weight than 105 Ultegra! Able to connect LTWOO APP You can choose 2x12s or 2x11s 1x 12s 1x11s 11 speed compatible (easy and cheap upgrade from your current groupset!) 2 years warranty Brand Name:LTWOO Model Number: eRX Total capacity:34T Gears:12Speed Material：Carbon Fibre Type:Rear Derailleur Components:Derailleur Origin: Mainland China Lightweight material Premium feeling Semi wireless like Shimano 12 speeds di2 Hydraulic disc brake LTWOO eRX uses two 14500 lithium batteries and two CR2032 button batteries. 14500 battery capacity: 800mAh, 3.7V, 2.96Wh. 14500 batteries installed in the battery box CR2032 battery installed inside the shifter. Both batteries can be purchased locally. Order here>https://www.icebikeheaven.com/ltwoo-erx-2x12s-2x11s-electronic-groupset-road-electronic-groupset-replaceable-battery-app-programming Deliver to Malaysia, SG, Brunei, Worldwide Accept Ewallet TouchnGo, installment & Credit card How to Order 1.Product Option: 2.Quantity: 3.Color: 4.Name: 5.Address: 6.Contact number: Send to ☎FB http://m.me/icebikeheaven ☎ http://www.wasap.my/60174204398 Sales, Order, Customer service ☎ http://www.wasap.my/60195272398 After sales/ Warranty FOLLOW US ✔ https://www.ebay.com/str/icebikeheaven37 ✔ https://shopee.com.my/icebikeheaven?tab=shop ✔ http://www.lazada.com.my/ice-bike-heaven/ ✔ https://fb.me/icebikeheaven ✔ https://www.instagram.com/icebikeheaven37/ Buy from Us! 🚴🏻💯% POSITIVE FEEDBACK 🚴🏻💯% Warranty & After Sale Service 🚴🏻💯% PARCEL ARRIVAL GUARANTEED 🚴🏻💯% ❌hidden charges 🚴🏻 7️⃣ days size exchange 🆗 🚴🏻 7️⃣ days 100% 💲💲 Guarantee back ☄ Prompt response 🥇♞ SSM Registered company- Icebikeheaven 🥇 8 Years of experience Bicycle shop or want to dropship? pm us now!