Merida Matts TFS 800 hardtail.

TFS 6061 aluminium hardtail frame

Merida “Techno Forming System” tubing

XC / cross-country geometry

26-inch wheels on most models

Suspension Fork

100 mm travel air fork

Models came with either:

RockShox XC30/XC32 Air, or

RST First Air Remote

Remote lockout on some versions

BikeRoar +2

Drivetrain

3x10 gearing (30-speed)

SRAM X5/X7 mix or Shimano SLX/XT mix depending on year

Crankset:

42/32/24 or 44/33/22

Cassette:

11–36T 10-speed

BikeRoar +2

Brakes

Hydraulic disc brakes

Common setups:

Avid Elixir 1

Shimano M505/M455

Rotor sizes:

180 mm front

160 mm rear

BikeRoar +2

Wheels & Tyres

26" alloy wheelset

Merida Pro D / Matts Pro D rims

Tyres usually:

Schwalbe Racing Ralph / Rocket Ron

Merida Race Lite 2.1

BikeRoar +2

Weight

Around 11.5–12.6 kg depending on size/spec

Merida +1

Your bike specifically

From your photos:

Frame size looks around 18"

Disc brakes fitted

Front suspension fork

Flat bars

Pedals upgraded from stock