Tonfly Tongue Switch 2.5mm Accessories not a separate battery cover

not a separate battery cover or after-order accessory

and the ability to switch between feet and meters

Comes complete with replacable cap that allows the unit to be used as a tunnel skid plates

purpose-built for canopy formation flying rather than general sport or freefall-focused use

There is light control line pressure

Tonfly Tongue Switch 2.5mm Accessories not a separate battery coverTonfly tongue switch with 2. 5 mm connector for compatible camera setups. Designed as a Tonfly camera accessory. Check compatibility with your helmet setup and always follow your DZ camera jumping rules before adding camera equipment. Source: Tonfly accessories.