Czech Step by Step: Pack (Textbook, Appendix and 2 Free Audio CDs) 2016 (English and Multilingual Edition)

PT-Smart Tennis Ball Machine - Smart App for Apple Watch & Phone Control, Tennis Ball Launcher with 20 Landing Points, 12 Training Modes & 4-6h Battery Life, Tennis Serving Machine (Black)

Furlihong 3819BH Portable Tennis Ball Machine – 5 Adjustable Angles, 2 Power Levels, 4 Serve Intervals, Up to 30 MPH, for All Skill Levels Training

Staneg Pro Tennis Ball Machine – Battery-Powered Portable Launcher with Remote Control | 9 Training Programs | Adjustable Spin & Speed | 150-Ball Capacity

PT-SMARTPro Tennis Ball Machine - Professional Auto Ball Server with App for Apple Watch Control, 20 Landing Points & Variable Speed, Tennis Trainer with Multi-Angle System (4-6H Runtime) (White)

PT-Smart Tennis Ball Machine, App-Controlled, 12–75 mph Speed, 1.8–8s Feed Interval, 100-Ball Capacity, 20 Landing Points, 5Hour Battery, Lightweight Design – for Beginners to Intermediate Players

Furlihong 3807BH Tennis Ball Machine with Triangular Base, Adjustable Speeds, Oscillating Left&Right, Up&Down Swing Launch Port, for All Levels Training

Fast Track Feedback System, Patented GEN2 Tennis Ball Machine for Practice 20 Feeds per min, Portable Tennis Machine with iOS Performance Tracking (Restocking Fee Applies to Returns)

Lobster Sports Elite Grand Four Tennis Ball Machine – Full Digital, Adjustable Ball Speed, 6 Pre-Loaded Drills, Match Play, Spin Control, Holds 150-Balls, Battery Powered, with 20 Function Remote