Using a Speed Bag (http://www.speedbagcentral.com/ssp/introduction) and Double End Bag (http://www.balazsboxing.com/cgi-bin/catalog2.cgi?action=page&page=in%20the%20gym|boxing%20basics|hitting%20a%20 double%20end%20striking%20bag) could be helpful for Volleyball training. Both can be adusted up high and help the player with holding the hands up, rhythm, speed, timing and targeting a moving object close to the face.

Just a few ideas to expand your training

Speedbag
put a little rhythm in your workout (http://www.putfile.com/speedbag)