Refillable journal with PU Cover and built-in ABS plastic wireless charging panel. Power/Technology: Input: DC 5V/1.5A; Output: DC 5V/0.8A (Wireless); Conversion efficiency: 70%; Charging methods: induction model; Working Frequency: 100-205 kHz; Conversion efficiency: 63%; Wireless Charging Distance: 0.15" to 0.23" (4 to 6mm). Wireless chargers operate at lower temperature than most traditional chargers. Wireless charging mat feature is designed to charge most remote wireless charging enabled smartphones (including iPhones 8, 8+ and X). and is more efficient than traditional chargers, and operates at lower temperature than most traditional chargers. Check your device specs for compatibility prior to purchase. Journal with 80 lined sheets of white 70g paper. Inner paper notebook can be replaced by those found in your local office supply store approx. size: 5"w x 8"h. Features LED indicator light for charge and standby. Note most cases must be removed from phone for wireless charging to work. Includes Instructions and USB to micro USB charging cable.