Part Number 4XH1D20851 Overview Lenovo Unified Pairing Receiver allows you to pair supported products to a new receiver if the original receiver is lost or to use 1 receiver across several devices. Support products list: Lenovo Go Wireless Split Keyboard (4Y41C337**); Lenovo Go Wireless Vertical Mouse (4Y51C33792); Lenovo Go Wireless Numeric Keypad (4Y41C33791); Lenovo Go USB-C Wireless Mouse (4Y51C21216); Lenovo Go Wireless Multi-Device Mouse (4Y51C21217); ThinkPad USB-C Essential Compact Wireless Mouse ( 4Y51D20848); Lenovo Professional Wireless Rechargeable Combo (4X31K039**); Lenovo Professional Wireless Rechargeable Keyboard (4Y41K040**). Key Details: 2.4GHz wireless connection Supports devices with Unified Pairing button Supports up to 8 compatible devices Tech Specs Color Black Weight 1.57 g (0.55 oz) Hardware Requirements Supported PC with USB -A port Warranty Type Customer Replaceable Unit (CRU) Brand Lenovo OS Requirements Windows 10, Windows 11 Packed Weight 31.57 g (1.11 oz) Agency Approvals CB. FCC, IC, CE, JRF, VCCI, SDDPI, SIRIM, NTC, IMDA, KCC, NCC, NBTC, MIC, DWLF&M, TRC, CITRA, ANRT, NCC, TRA, CRA, ICASA, MINCOM CERT and ANCE, TRA, CNC/AFTIC, ANATEL, SUBTEL, IFTEL Package Type Blister Packed Dimensions (L x D x H) 127 *89 *15 mm (5.0 *3.50* 0.59 in) Height 4.50 mm (0.18 in) Cable Length 18.40 mm (0.75 in) Depth 12.30 mm (0.48 in) Warranty Period 1 Year Maximum Operating Temperature 40 degrees Celsius (104 degrees Fahrenheit) Minimum Operating Temperature 0 degrees Celsius (32 degrees Fahrenheit) Maximum Relative Humidity (%) 95% Minimum Relative Humidity (%) 20% Connection Type 2.4G wireless via USB-A Port