Rayovac Extra Hearing Aid Batteries - 30 Pack - Free Battery Keychain Tester/Carry Case Maintenance Wax collects in filter and

Wax collects in filter and home use should get 6 months service

Internals operate on 12VDC and power Supply is desktop style of 120/240Vac

Omni-Directional microphones allow for improved hearing when multiple people are in the conversation

Easy to clean

Includes five 6-cell cards of batteries

Rayovac Extra Hearing Aid Batteries - 30 Pack - Free Battery Keychain Tester/Carry Case Maintenance Wax collects in filter andIncludes five 6 cell cards of batteries, plus a battery tester with a spare battery compartment and a handy carry chain for attaching to your purse or keys. Rayovac Extra Advanced, Zinc Air Hearing Aid Batteries 1. 45V Dial Card 6. The World's Longest Lasting Battery. Choose from 10A or 312 or 13 size batteries.